We granted certiorari to determine whether a process for curing synthetic rubber which includes in several of its steps the use of a mathematical formula and a programmed digital computer is patentable subject matter under 35 U. S. C. § 101.
I
The patent application at issue was filed by the respondents on August 6, 1975. The claimed invention is a process for molding raw, uncured synthetic rubber into cured precision products. The process uses a mold for precisely shaping the uncured material under heat and pressure and then curing the synthetic rubber in the mold so that the product will retain its shape and be functionally operative after the molding is completed.
Respondents claim that their process ensures the production of molded articles which are properly cured. Achieving the perfect cure depends upon several factors including the thickness of the article to be molded, the temperature of the molding process, and the amount of time that the article is allowed to remain in the press. It is possible using well-known time, temperature, and cure relationships to calculate by means of the Arrhenius equation
Respondents characterize their contribution to the art to reside in the process of constantly measuring the actual temperature inside the mold. These temperature measurements are then automatically fed into a computer which repeatedly recalculates the cure time by use of the Arrhenius equation.
The patent examiner rejected the respondents' claims on the sole ground that they were drawn to nonstatutory subject matter under 35 U. S. C. § 101.
The Patent and Trademark Office Board of Appeals agreed with the examiner, but the Court of Customs and Patent Appeals reversed. In re Diehr, 602 F.2d 892 (1979). The court noted that a claim drawn to subject matter otherwise statutory does not become nonstatutory because a computer is involved. The respondents' claims were not directed to a mathematical algorithm or an improved method of calculation but rather recited an improved process for molding rubber articles by solving a practical problem which had arisen in the molding of rubber products.
The Commissioner of Patents and Trademarks sought certiorari arguing that the decision of the Court of Customs and Patent Appeals was inconsistent with prior decisions of this Court. Because of the importance of the question presented, we granted the writ. 445 U.S. 926 (1980).
II
Last Term in Diamond v. Chakrabarty, 447 U.S. 303 (1980), this Court discussed the historical purposes of the patent laws and in particular 35 U. S. C. § 101. As in Chakrabarty, we must here construe 35 U. S. C. § 101 which provides:
The Patent Act of 1793 defined statutory subject matter as "any new and useful art, machine, manufacture or composition of matter, or any new or useful improvement [thereof]." Act of Feb. 21, 1793, ch. 11, § 1, 1 Stat. 318. Not until the patent laws were recodified in 1952 did Congress replace the word "art" with the word "process." It is that latter word which we confront today, and in order to determine its meaning we may not be unmindful of the Committee Reports accompanying the 1952 Act which inform us that Congress intended statutory subject matter to "include anything under the sun that is made by man." S. Rep. No. 1979, 82d Cong., 2d Sess., 5 (1952); H. R. Rep. No. 1923, 82d Cong., 2d Sess., 6 (1952).
Although the term "process" was not added to 35 U. S. C. § 101 until 1952, a process has historically enjoyed patent protection because it was considered a form of "art" as that term was used in the 1793 Act.
Analysis of the eligibility of a claim of patent protection for a "process" did not change with the addition of that term to § 101. Recently, in Gottschalk v. Benson, 409 U.S. 63 (1972), we repeated the above definition recited in Cochrane v. Deener, adding: "Transformation and reduction of an article `to a different state or thing' is the clue to the patentability of a process claim that does not include particular machines." 409 U. S., at 70.
Analyzing respondents' claims according to the above statements from our cases, we think that a physical and chemical process for molding precision synthetic rubber products falls within the § 101 categories of possibly patentable subject matter. That respondents' claims involve the transformation of an article, in this case raw, uncured synthetic rubber, into a different state or thing cannot be disputed. The respondents' claims describe in detail a step-by-step method for accomplishing such, beginning with the loading of a mold with raw, uncured rubber and ending with the eventual opening of the press at the conclusion of the cure. Industrial processes such as this are the types which have historically been eligible to receive the protection of our patent laws.
Our conclusion regarding respondents' claims is not altered by the fact that in several steps of the process a mathematical equation and a programmed digital computer are used. This Court has undoubtedly recognized limits to § 101 and every discovery is not embraced within the statutory terms. Excluded from such patent protection are laws of nature, natural phenomena, and abstract ideas. See Parker v. Flook, 437 U.S. 584 (1978); Gottschalk v. Benson, supra, at 67; Funk Bros. Seed Co. v. Kalo Inoculant Co., 333 U.S. 127, 130 (1948). "An idea of itself is not patentable," Rubber-Tip Pencil Co. v. Howard, 20 Wall. 498, 507 (1874). "A principle, in the abstract, is a fundamental truth; an original cause; a motive; these cannot be patented, as no one can claim in either of them an exclusive right." Le Roy v. Tatham, 14 How. 156, 175 (1853). Only last Term, we explained:
Our recent holdings in Gottschalk v. Benson, supra, and Parker v. Flook, supra, both of which are computer-related, stand for no more than these long-established principles. In Benson, we held unpatentable claims for an algorithm used to convert binary code decimal numbers to equivalent pure binary numbers. The sole practical application of the algorithm was in connection with the programming of a
Parker v. Flook, supra, presented a similar situation. The claims were drawn to a method for computing an "alarm limit." An "alarm limit" is simply a number and the Court concluded that the application sought to protect a formula for computing this number. Using this formula, the updated alarm limit could be calculated if several other variables were known. The application, however, did not purport to explain how these other variables were to be determined,
In contrast, the respondents here do not seek to patent a mathematical formula. Instead, they seek patent protection for a process of curing synthetic rubber. Their process admittedly employs a well-known mathematical equation, but they do not seek to pre-empt the use of that equation. Rather, they seek only to foreclose from others the use of that equation in conjunction with all of the other steps in their claimed process. These include installing rubber in a press, closing the mold, constantly determining the temperature of the mold, constantly recalculating the appropriate cure time through the use of the formula and a digital computer, and automatically opening the press at the proper time. Obviously, one does not need a "computer" to cure natural or synthetic rubber, but if the computer use incorporated in the process patent significantly lessens the possibility of "overcuring" or "undercuring," the process as a whole does not thereby become unpatentable subject matter.
Our earlier opinions lend support to our present conclusion that a claim drawn to subject matter otherwise statutory does not become nonstatutory simply because it uses a mathematical formula, computer program, or digital computer. In Gottschalk v. Benson we noted: "It is said that the decision precludes a patent for any program servicing a computer. We do not so hold." 409 U. S., at 71. Similarly, in Parker v. Flook we stated that "a process is not unpatentable simply because it contains a law of nature or a mathematical algorithm." 437 U. S., at 590. It is now commonplace that an application of a law of nature or mathematical formula to a known structure or process may well be deserving of patent protection. See, e. g., Funk Bros. Seed
We think this statement in Mackay takes us a long way toward the correct answer in this case. Arrhenius' equation is not patentable in isolation, but when a process for curing rubber is devised which incorporates in it a more efficient solution of the equation, that process is at the very least not barred at the threshold by § 101.
In determining the eligibility of respondents' claimed process for patent protection under § 101, their claims must be considered as a whole. It is inappropriate to dissect the claims into old and new elements and then to ignore the presence of the old elements in the analysis. This is particularly true in a process claim because a new combination of steps in a process may be patentable even though all the constituents of the combination were well known and in common use before the combination was made. The "novelty" of any element or steps in a process, or even of the
It has been urged that novelty is an appropriate consideration under § 101. Presumably, this argument results from the language in § 101 referring to any "new and useful" process, machine, etc. Section 101, however, is a general statement of the type of subject matter that is eligible for patent protection "subject to the conditions and requirements of this title." Specific conditions for patentability follow and § 102 covers in detail the conditions relating to novelty.
It is later stated in the same Report:
Finally, it is stated in the "Revision Notes":
See also H. R. Rep. No. 1923, 82d Cong., 2d Sess., 6, 7, and 17 (1952).
In this case, it may later be determined that the respondents' process is not deserving of patent protection because it fails to satisfy the statutory conditions of novelty under § 102 or nonobviousness under § 103. A rejection on either of these grounds does not affect the determination that respondents' claims recited subject matter which was eligible for patent protection under § 101.
IV
We have before us today only the question of whether respondents' claims fall within the § 101 categories of possibly patentable subject matter. We view respondents' claims as nothing more than a process for molding rubber products and not as an attempt to patent a mathematical formula. We recognize, of course, that when a claim recites a mathematical formula (or scientific principle or phenomenon of nature), an inquiry must be made into whether the claim is seeking patent protection for that formula in the abstract. A mathematical formula as such is not accorded the protection of our patent laws, Gottschalk v. Benson, 409 U.S. 63 (1972), and this principle cannot be circumvented by attempting to limit the use of the formula to a particular technological environment. Parker v. Flook, 437 U.S. 584 (1978). Similarly, insignificant postsolution activity will not transform
It is so ordered.
JUSTICE STEVENS, with whom JUSTICE BRENNAN, JUSTICE MARSHALL, and JUSTICE BLACKMUN join, dissenting.
The starting point in the proper adjudication of patent litigation is an understanding of what the inventor claims
I
Before discussing the major flaws in the Court's opinion, a word of history may be helpful. As the Court recognized in Parker v. Flook, 437 U.S. 584, 595 (1978), the computer industry is relatively young. Although computer technology seems commonplace today, the first digital computer capable of utilizing stored programs was developed less than 30 years ago.
Prior to 1968, well-established principles of patent law probably would have prevented the issuance of a valid patent on almost any conceivable computer program. Under the "mental steps" doctrine, processes involving mental operations were considered unpatentable. See, e. g., In re Heritage, 32 C. C. P. A. (Pat.) 1170, 1173-1177, 150 F.2d 554, 556-558 (1945); In re Shao Wen Yuan, 38 C. C. P. A. (Pat.) 967, 972-976, 188 F.2d 377, 380-383 (1951). The mental-steps doctrine was based upon the familiar principle that a scientific concept or mere idea cannot be the subject of a valid patent. See In re Bolongaro, 20 C. C. P. A. (Pat.) 845, 846-847, 62 F.2d 1059, 1060 (1933).
Concern with the patent system's ability to deal with rapidly changing technology in the computer and other fields led to the formation in 1965 of the President's Commission on the Patent System. After studying the question of computer program patentability, the Commission recommended that computer programs be expressly excluded from the coverage of the patent laws; this recommendation was based primarily upon the Patent Office's inability to deal with the administrative burden of examining program applications.
The new guidelines were to have a short life. Beginning with two decisions in 1968, a dramatic change in the law as understood by the Court of Customs and Patent Appeals took place. By repudiating the well-settled "function of a machine" and "mental steps" doctrines, that court reinterpreted § 101 of the Patent Code to enlarge drastically the categories of patentable subject matter. This reinterpretation would lead to the conclusion that computer programs were within the categories of inventions to which Congress intended to extend patent protection.
In In re Tarczy-Hornoch, 55 C. C. P. A. (Pat.) 1441, 397 F.2d 856 (1968), a divided Court of Customs and Patent Appeals overruled the line of cases developing and applying the "function of a machine" doctrine. The majority acknowledged that the doctrine had originated with decisions of this Court and that the lower federal courts, including the Court of Customs and Patent Appeals, had consistently adhered to it during the preceding 70 years. Nonetheless, the court concluded that the doctrine rested on a misinterpretation of the precedents and that it was contrary to "the basic purposes of the patent system and productive of a range of undesirable results from the harshly inequitable to the silly." Id., at 1454, 397 F. 2d, at 867.
The Court of Customs and Patent Appeals turned its attention to process claims encompassing computer programs in In re Musgrave, 57 C. C. P. A. (Pat.) 1352, 431 F.2d 882 (1970). In that case, the court emphasized the fact that Prater had done away with the mental-steps doctrine; in particular, the court rejected the Patent Office's continued reliance upon the "point of novelty" approach to claim analysis. Id., at 1362, 431 F. 2d, at 889.
In re Benson, of course, was reversed by this Court in Gottschalk v. Benson, 409 U.S. 63 (1972).
The Court of Customs and Patent Appeals in subsequent cases began to narrow its interpretation of Benson. In In re Johnston, 502 F.2d 765 (1974), the court held that a record-keeping machine system which comprised a programmed digital computer was patentable subject matter under § 101. Id., at 771. The majority dismissed Benson with the observation that Benson involved only process, not apparatus, claims. 502 F. 2d, at 771. Judge Rich dissented, arguing that to limit Benson only to process claims would make patentability turn upon the form in which a program invention was claimed. 502 F. 2d, at 773-774.
Following Noll and Chatfield, the Court of Customs and Patent Appeals consistently interpreted Benson to preclude the patenting of a program-related process invention only when the claims, if allowed, would wholly pre-empt the algorithm itself. One of the cases adopting this view was In re Flook, 559 F.2d 21 (1977),
Although the Court of Customs and Patent Appeals in several post-Flook decisions held that program-related inventions were not patentable subject matter under § 101, see, e. g., In re Sarkar, 588 F.2d 1330 (1978); In re Gelnovatch, 595 F.2d 32 (1979), in general Flook was not enthusiastically received by that court. In In re Bergy, 596 F.2d 952 (1979), the majority engaged in an extensive critique of Flook, concluding that this Court had erroneously commingled "distinct statutory provisions which are conceptually unrelated." 596 F. 2d, at 959.
II
As I stated at the outset, the starting point in the proper adjudication of patent litigation is an understanding of what the inventor claims to have discovered. Indeed, the outcome of such litigation is often determined by the judge's understanding of the patent application. This is such a case.
In the first sentence of its opinion, the Court states the question presented as "whether a process for curing synthetic rubber . . . is patentable subject matter." Ante, at 177. Of course, that question was effectively answered many years ago when Charles Goodyear obtained his patent on the vulcanization process.
As the Court reads the claims in the Diehr and Lutton patent application, the inventors' discovery is a method of constantly measuring the actual temperature inside a rubber molding press.
There are three reasons why I cannot accept the Court's conclusion that Diehr and Lutton claim to have discovered a new method of constantly measuring the temperature inside a mold. First, there is not a word in the patent application that suggests that there is anything unusual about the temperature-reading devices used in this process—or indeed that any particular species of temperature-reading device should be used in it.
A fair reading of the entire patent application, as well as the specific claims, makes it perfectly clear that what Diehr and Lutton claim to have discovered is a method of using a digital computer to determine the amount of time that a rubber molding press should remain closed during the synthetic rubber-curing process. There is no suggestion that there is anything novel in the instrumentation of the mold, in actuating a timer when the press is closed, or in automatically opening the press when the computed time expires.
Parker v. Flook, 437 U.S. 584 (1978), involved the use of a digital computer in connection with a catalytic conversion process. During the conversion process, variables such as temperature, pressure, and flow rates were constantly monitored and fed into the computer; in this case, temperature in the mold is the variable that is monitored and fed into the computer. In Flook, the digital computer repetitively recalculated the "alarm limit"—a number that might signal the need to terminate or modify the catalytic conversion process; in this case, the digital computer repetitively recalculates the correct curing time—a number that signals the time when the synthetic rubber molding press should open.
The essence of the claimed discovery in both cases was an algorithm that could be programmed on a digital computer.
III
The Court misapplies Parker v. Flook because, like the Court of Customs and Patent Appeals, it fails to understand or completely disregards the distinction between the subject matter of what the inventor claims to have discovered—the § 101 issue—and the question whether that claimed discovery is in fact novel—the § 102 issue.
Proper analysis, therefore, must start with an understanding of what the inventor claims to have discovered—or phrased somewhat differently—what he considers his inventive concept to be.
If that method is regarded as an "algorithm" as that term was used in Gottschalk v. Benson, 409 U.S. 63 (1972), and in
As the Court recognizes today, Flook also rejected the argument that patent protection was available if the inventor did not claim a monopoly on every conceivable use of the algorithm but instead limited his claims by describing a specific postsolution activity—in that case setting off an alarm in a catalytic conversion process. In its effort to distinguish Flook from the instant case, the Court characterizes that postsolution activity as "insignificant," ante, at 191, or as merely "token" activity, ante, at 192, n. 14. As a practical matter, however, the postsolution activity described in the Flook application was no less significant than the automatic opening of the curing mold involved in this case. For setting off an alarm limit at the appropriate time is surely as important to the safe and efficient operation of a catalytic conversion process as is actuating the mold-opening device in a synthetic rubber-curing process. In both cases, the post-solution activity is a significant part of the industrial process. But in neither case should that activity have any legal significance because it does not constitute a part of the inventive concept that the applicants claimed to have discovered.
In Gottschalk v. Benson, we held that a program for the
Even the Court does not suggest that the computer program developed by Diehr and Lutton is a patentable discovery. Accordingly, if we treat the program as though it were a familiar part of the prior art—as well-established precedent requires
IV
The broad question whether computer programs should be given patent protection involves policy considerations that
Within the Federal Government, patterns of decision have also emerged. Gottschalk, Dann, Parker, and Diamond were not ordinary litigants—each was serving as Commissioner of Patents and Trademarks when he opposed the availability of patent protection for a program-related invention. No doubt each may have been motivated by a concern about the ability of the Patent Office to process effectively the flood of applications that would inevitably flow from a decision that computer programs are patentable.
In my judgment, today's decision will aggravate the first concern and will not adequately allay the second. I believe both concerns would be better addressed by (1) an unequivocal holding that no program-related invention is a patentable process under § 101 unless it makes a contribution to the art that is not dependent entirely on the utilization of a computer, and (2) an unequivocal explanation that the term "algorithm" as used in this case, as in Benson and Flook, is synonymous with the term "computer program."
FootNotes
Briefs of amici curiae urging affirmance were filed by Donald R. Dunner, Kenneth E. Kuffner, and Travis Gordon White for the American Patent Law Association, Inc.; by Morton C. Jacobs for Applied Data Research, Inc.; by William L. Mathis and Harold D. Messner for Chevron Research Co.; and by Reed C. Lawlor and James W. Geriak for the Los Angeles Patent Law Association.
ln v=CZ+x
wherein ln v is the natural logarithm of v, the total required cure time; C is the activation constant, a unique figure for each batch of each compound being molded, determined in accordance with rheometer measurements of each batch; Z is the temperature in the mold; and x is a constant dependent on the geometry of the particular mold in the press. A rheometer is an instrument to measure flow of viscous substances.
"1. A method of operating a rubber-molding press for precision molded compounds with the aid of a digital computer, comprising:
"providing said computer with a data base for said press including at least,
"natural logarithm conversion data (ln),
"the activation energy constant (C) unique to each batch of said compound being molded, and
"a constant (x) dependent upon the geometry of the particular mold of the press,
"initiating an interval timer in said computer upon the closure of the press for monitoring the elapsed time of said closure,
"constantly determining the temperature (Z) of the mold at a location closely adjacent to the mold cavity in the press during molding,
"constantly providing the computer with the temperature (Z),
"repetitively calculating in the computer, at frequent intervals during each cure, the Arrhenius equation for reaction time during the cure, which is
"ln v=CZ+x
"where v is the total required cure time,
"repetitively comparing in the computer at said frequent intervals during the cure each said calculation of the total required cure time calculated with the Arrhenius equation and said elapsed time, and
"opening the press automatically when a said comparison indicates equivalence.
"2. The method of claim 1 including measuring the activation energy constant for the compound being molded in the press with a rheometer and automatically updating said data base within the computer in the event of changes in the compound being molded in said press as measured by said rheometer.
.....
"11. A method of manufacturing precision molded articles from selected synthetic rubber compounds in an openable rubber molding press having at least one heated precision mold, comprising:
"(a) heating said mold to a temperature range approximating a pre-determined rubber curing temperature,
"(b) installing prepared unmolded synthetic rubber of a known compound in a molding cavity of predetermined geometry as defined by said mold,
"(c) closing said press to mold said rubber to occupy said cavity in conformance with the contour of said mold and to cure said rubber by transfer of heat thereto from said mold,
"(d) initiating an interval timer upon the closure of said press for monitoring the elapsed time of said closure,
"(e) heating said mold during said closure to maintain the temperature thereof within said range approximating said rubber curing temperature,
"(f) constantly determining the temperature of said mold at a location closely adjacent said cavity thereof throughout closure of said press,
"(g) repetitively calculating at frequent periodic intervals throughout closure of said press the Arrhenius equation for reaction time of said rubber to determine total required cure time v as follows:
"ln v=cz+x
"wherein c is an activation energy constant determined for said rubber being molded and cured in said press, z is the temperature of said mold at the time of each calculation of said Arrhenius equation, and x is a constant which is a function of said predetermined geometry of said mold,
"(h) for each repetition of calculation of said Arrhenius equation herein, comparing the resultant calculated total required cure time with the monitored elapsed time measured by said interval timer,
"(i) opening said press when a said comparison of calculated total required cure time and monitored elapsed time indicates equivalence, and
"(j) removing from said mold the resultant precision molded and cured rubber article."
"The term `process' means process, art or method, and includes a new use of a known process, machine, manufacture, composition of matter, or material."
"A process, eo nomine, is not made the subject of a patent in our act of congress. It is included under the general term `useful art.' An art may require one or more processes or machines in order to produce a certain result or manufacture. The term machine includes every mechanical device or combination of mechanical powers and devices to perform some function and produce a certain effect or result. But where the result or effect is produced by chemical action, by the operation or application of some element or power of nature, or of one substance to another, such modes, methods, or operations, are called processes. A new process is usually the result of discovery; a machine, of invention. The arts of tanning, dyeing, making water-proof cloth, vulcanizing India rubber, smelting ores, and numerous others, are usually carried on by processes as distinguished from machines. One may discover a new and useful improvement in the process of tanning, dyeing, &c., irrespective of any particular form of machinery or mechanical device. And another may invent a labor-saving machine by which this operation or process may be performed, and each may be entitled to his patent. As, for instance, A has discovered that by exposing India rubber to a certain degree of heat, in mixture or connection with certain metalic salts, he can produce a valuable product, or manufacture; he is entitled to a patent for his discovery, as a process or improvement in the art, irrespective of any machine or mechanical device. B, on the contrary, may invent a new furnace or stove, or steam apparatus, by which this process may be carried on with much saving of labor, and expense of fuel; and he will be entitled to a patent for his machine, as an improvement in the art. Yet A could not have a patent for a machine, or B for a process; but each would have a patent for the means or method of producing a certain result, or effect, and not for the result or effect produced. It is for the discovery or invention of some practical method or means of producing a beneficial result or effect, that a patent is granted, and not for the result or effect itself. It is when the term process is used to represent the means or method of producing a result that it is patentable, and it will include all methods or means which are not effected by mechanism or mechanical combinations."
"That a patent can be granted for a process, there can be no doubt. The patent law is not confined to new machines and new compositions of matter, but extends to any new and useful art or manufacture. A manufacturing process is clearly an art, within the meaning of the law. Good-year's patent was for a process, namely, the process of vulcanizing india-rubber by subjecting it to a high degree of heat when mixed with sulphur and a mineral salt. The apparatus for performing the process was not patented, and was not material. The patent pointed out how the process could be effected, and that was deemed sufficient." Id., at 722.
"`1. A fixed step-by-step procedure for accomplishing a given result; usually a simplified procedure for solving a complex problem, also a full statement of a finite number of steps. 2. A defined process or set of rules that leads [sic] and assures development of a desired output from a given input. A sequence of formulas and/or algebraic/logical steps to calculate or determine a given task; processing rules.'" Brief for Petitioner in Diamond v. Bradley, O. T. 1980, No. 79-855, p. 6, n. 12, quoting C. Sippl & R. Sippl, Computer Dictionary and Handbook 23 (2d ed. 1972).
This definition is significantly broader than the definition this Court employed in Benson and Flook. Our previous decisions regarding the patentability of "algorithms" are necessarily limited to the more narrow definition employed by the Court, and we do not pass judgment on whether processes falling outside the definition previously used by this Court, but within the definition offered by the petitioner, would be patentable subject matter.
"He who discovers a hitherto unknown phenomenon of nature has no claim to a monopoly of it which the law recognizes. If there is to be invention from such a discovery, it must come from the application of the law of nature to a new and useful end."
Although we were dealing with a "product" claim in Funk Bros., the same principle applies to a process claim. Gottschalk v. Benson, 409 U.S. 63, 68 (1972).
"A person shall be entitled to a patent unless—
"(a) the invention was known or used by others in this country, or patented or described in a printed publication in this or a foreign country, before the invention thereof by the applicant for patent, or
"(b) the invention was patented or described in a printed publication in this or a foreign country or in public use or on sale in this country, more than one year prior to the date of the application for patent in the United States, or
"(c) he has abandoned the invention, or
"(d) the invention was first patented or caused to be patented, or was the subject of an inventor's certificate, by the applicant or his legal representatives or assigns in a foreign country prior to the date of the application for patent in this country on an application for patent or inventor's certificate filed more than twelve months before the filing of the application in the United States, or
"(e) the invention was described in a patent granted on an application for patent by another filed in the United States before the invention thereof by the applicant for patent, or on an international application by another who has fulfilled the requirements of paragraphs (1), (2), and (4) of section 371 (c) of this title before the invention thereof by the applicant for patent, or
"(f) he did not himself invent the subject matter sought to be patented, or
"(g) before the applicant's invention thereof the invention was made in this country by another who had not abandoned, suppressed, or concealed it. In determining priority of invention there shall be considered not only the respective dates of conception and reduction to practice of the invention, but also the reasonable diligence of one who was first to conceive and last to reduce to practice, from a time prior to conception by the other."
"The patents were warranted not by the novelty of their elements but by the novelty of the combination they represented. Invention was recognized because Laitram's assignors combined ordinary elements in an extraordinary way—a novel union of old means was designed to achieve new ends. Thus, for both inventions `the whole in some way exceed[ed] the sum of its parts.' Great A. & P. Tea Co. v. Supermarket Equipment Corp., 340 U.S. 147, 152 (1950)." Id., at 521-522 (footnote omitted).
In order for the dissent to reach its conclusion it is necessary for it to read out of respondents' patent application all the steps in the claimed process which it determined were not novel or "inventive." That is not the purpose of the § 101 inquiry and conflicts with the proposition recited above that a claimed invention may be entitled to patent protection even though some or all of its elements are not "novel."
"Uncertainty now exists as to whether the statute permits a valid patent to be granted on programs. Direct attempts to patent programs have been rejected on the ground of nonstatutory subject matter. Indirect attempts to obtain patents and avoid the rejection, by drafting claims as a process, or a machine or components thereof programmed in a given manner, rather than as a program itself, have confused the issue further and should not be permitted." Report of the President's Commission on the Patent System, "To Promote the Progress of . . . Useful Arts" in an Age of Exploding Technology 14 (1966).
"A manufacturing process is clearly an art, within the meaning of the law. Goodyear's patent was for a process, namely, the process of vulcanizing india-rubber by subjecting it to a high degree of heat when mixed with sulphur and a mineral salt.
.....
"The mixing of certain substances together, or the heating of a substance to a certain temperature, is a process." Tilghman v. Proctor, 102 U.S. 707, 722, 728 (1881).
See also Corning v. Burden, 15 How. 252, 267 (1854). Modern rubber curing methods apparently still are based in substantial part upon the concept discovered by Goodyear:
"Since the day 120 years ago when Goodyear first heated a mixture of rubber and sulphur on a domestic stove and so discovered vulcanisation, this action of heat and sulphur has remained the standard method of converting crude rubber, with all its limitations, into a commercially usable product, giving it the qualities of resistance to heat and cold in addition to considerable mechanical strength.
"Goodyear also conjured up the word `cure' for vulcanisation, and this has become the recognised term in production circles." Mernagh, Practical Vulcanisation, in The Applied Science of Rubber 1053 (W. Naunton ed. 1961).
See generally Kimmich, Making Rubber Products for Engineering Uses, in Engineering Uses of Rubber 18, 28-34 (A. McPherson & A. Klemin eds. 1956)
"An interval timer starts running from the time of mold closure, and the temperature within the mold cavity is measured often, typically every ten seconds. The temperature is fed to a computer . . . ." App. to Pet. for Cert. 38a.
In the portion of the application entitled "Background of the Invention," the following statement is found:
"By accurate and constant calculation and recalculation of the correct mold time under the temperatures actually present in the mold, the material can be cured accurately and can be relied upon to produce very few rejections, perhaps completely eliminating all rejections due to faulty mold cure." Id., at 41a.
And, in the "Summary of the Invention," this statement appears:
"A surveillance system is maintained over the mold to determine the actual mold temperature substantially continuously, for example, every ten seconds, and to feed that information to the computer along with the pertinent stored data and along with the elapsed time information." Ibid.
Finally, in a description of a simple hypothetical application using the invention described in Claim 1, this is the reference to the temperature-reading device:
"Thermocouples, or other temperature-detecting devices, located directly within the mold cavity may read the temperature at the surface where the molding compound touches the mold, so that it actually gets the temperature of the material at that surface." Id., at 45a.
"Vulcanisation is too important an operation to be left to human control, however experienced and conscientious. Instrumentation makes controlled cure possible, and in consequence instrument engineering is a highly important function in the modern rubber factory, skilled attention being necessary, not only in the maintenance of the instruments but also in their siting. There are instruments available which will indicate, record or control all the services involved in vulcanisation, including time, temperature and pressure, and are capable of setting in motion such operations as the opening and closing of moulds and, in general, will control any process variable which is capable of being converted into an electric charge or pneumatic or hydraulic pressure impulse." Mernagh, supra n. 25, at 1091-1092.
"The Diehr invention improved the control system by continually remeasuring the temperature and recalculating the proper cure time. The computer would simultaneously keep track of the elapsed time. When the elapsed time equalled the proper cure time, the rubber would be released automatically from the mold.
"The facts are difficult to distinguish from those in Flook. Both processes involved (1) an initial calculation, (2) continual remeasurement and recalculation, and (3) some control use of the value obtained from the calculation." Novick & Wallenstein, supra n. 5, at 326 (footnotes omitted).
"An improved method of calculating the cure time of a rubber molding process utilizing a digital computer comprising the steps of:
"a. inputting into said computer input values including
"1. natural logarithm conversion data ([1]n),
"2. an activation energy constant (C) unique to each batch of rubber being molded,
"3. a constant (X) dependent upon the geometry of the particular mold of the press, and
"4. continuous temperature values (Z) of the mold during molding;
"b. operating said computer for
"1. counting the elapsed cure time,
"2. calculating the cure time from the input values using the Arrhenius equation [l]n V=CZ+X, where V is the total cure time, and
"c. providing output signals from said computer when said calculated cure time is equal to said elapsed cure time." Ibid.
The authors correctly conclude that even the lower court probably would have found that this claim was drawn to unpatentable subject matter under § 101. Id., at 505-506.
"The obligation to determine what type of discovery is sought to be patented must precede the determination of whether that discovery is, in fact, new or obvious." 437 U. S., at 593.
As the Court of Customs and Patent Appeals noted in this case, "for the claim to be statutory, there must be some substance to it other than the recitation and solution of the equation or formula." 602 F. 2d, at 988. See Comment, 62 J. Pat. Off. Soc., supra n. 22, at 522-523.
"This assumption is based on respondent's narrow reading of Benson, and is as untenable in the context of § 101 as it is in the context of that case. It would make the determination of patentable subject matter depend simply on the draftsman's art and would ill serve the principles underlying the prohibition against patents for `ideas' or phenomena of nature. The rule that the discovery of a law of nature cannot be patented rests, not on the notion that natural phenomena are not processes, but rather on the more fundamental understanding that they are not the kind of `discoveries' that the statute was enacted to protect." 437 U. S., at 593 (footnote omitted).
"The invention will probably best be understood by first describing a simple example, in which a single mold is involved and in which the information is relatively static.
.....
"A standard digital computer may be employed in this method. It has a data storage bank of suitable size which, of course, may vary when many molds are used and when more refinements are employed. However, Fig. 1 shows a relatively simple case which achieves results that are vast improvements over what has been done up to now. . . .
"The data bank of the computer is provided with a digital input into which the time-temperature cure data for the compound involved is fed, as shown in Fig. 1. All the data is available to the computer upon call, by random access, and the call can be automatic depending upon the temperature actually involved. In other words, the computer over and over questions the data storage, asking, what is the proper time of cure for the following summation of temperatures? The question may be asked each second, and the answer is readily provided.
.....
"Recalculation continues until the time that has elapsed since mold closure corresponds with the calculated time. Then, the computer actuates the mold-opening device and the mold is automatically opened." App. to Pet. for Cert. 43a-45a.
The Figure 1 referred to in the application is as follows:
Id., at 53a.
"The patent sought is on a method of programming a general-purpose digital computer to convert signals from binary-coded decimal form into pure binary form. A procedure for solving a given type of mathematical problem is known as an `algorithm.' The procedures set forth in the present claims are of that kind; that is to say, they are a generalized formulation for programs to solve mathematical problems of converting one form of numerical representation to another. From the generic formulation, programs may be developed as specific applications." 409 U. S., at 65.
"The notion that post-solution activity, no matter how conventional or obvious in itself, can transform an unpatentable principle into a patentable process exalts form over substance. A competent draftsman could attach some form of post-solution activity to almost any mathematical formula; the Pythagorean theorem would not have been patentable, or partially patentable, because a patent application contained a final step indicating that the formula, when solved, could be usefully applied to existing surveying techniques. The concept of patentable subject matter under § 101 is not `like a nose of wax which may be turned and twisted in any direction . . . .' White v. Dunbar, 119 U.S. 47, 51." 437 U. S., at 590 (footnote omitted).
"Mackay Radio and Funk Bros. point to the proper analysis for this case: The process itself, not merely the mathematical algorithm, must be new and useful. Indeed, the novelty of the mathematical algorithm is not a determining factor at all. Whether the algorithm was in fact known or unknown at the time of the claimed invention, as one of the `basic tools of scientific and technological work,' see Gottschalk v. Benson, 409 U. S., at 67, it is treated as though it were a familiar part of the prior art." 437 U. S., at 591-592.
"The need of the incentive of patents for software is at least as great as that of the incentive available for hardware, because: "Today, providing computer software involves greater . . . risk than providing computer. . . hardware. . . .'
"To a financial giant, the economic value of a patent may not loom large; to the small software products companies upon which the future of the development of quality software depends, the value of the patent in financing a small company may spell the difference between life and death. To banks and financial institutions the existence of a patent or even the potentiality of obtaining one may well be a decisive factor in determining whether a loan should be granted. To prospective investors a patent or the possibility of obtaining one may be the principal element in the decision whether to invest.
"Making clear that patents may be available for inventions in software would unleash important innovative talent. It would have the direct opposite effect forecast by the . . . hardware manufacturers; it would enable competition with those companies and provide the needed incentive to stimulate innovation." Brief for ADAPSO as Amicus Curiae in Parker v. Flook, O. T. 1977, No. 77-642, p. 44 (footnote omitted).
"The Patent Office now cannot examine applications for programs because of the lack of a classification technique and the requisite search files. Even if these were available, reliable searches would not be feasible or economic because of the tremendous volume of prior art being generated. Without this search, the patenting of programs would be tantamount to mere registration and the presumption of validity would be all but nonexistent." Report of the President's Commission, supra n. 10, at 13.
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