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LUBRI-ZOL CORPORATION v. KINGSLAND

No. 9576.

169 F.2d 306 (1948)

LUBRI-ZOL CORPORATION v. KINGSLAND.

United States Court of Appeals District of Columbia.

Decided June 15, 1948.

Attorney(s) appearing for the Case

Mr. Oscar C. Limbach, of the Bar of the State of Ohio, of Cleveland, Ohio, pro hac vice, by special leave of court, with whom Mr. Edwin R. Hutchinson, of Washington, D. C., was on the brief, for appellant.

Mr. E. L. Reynolds, U. S. Patent Office, of Washington, D. C., with whom Mr. W. W. Cochran, Sol. U. S. Patent Office, of Washington, D. C., was on the brief, for appellee.

Before EDGERTON, PRETTYMAN and PROCTOR, Associate Justices.

PRETTYMAN, Associate Justice.

This is a chemical patent case. Appellant claimed a patent on a lubricant which consisted of ordinary mineral lubricating oil plus an additive. The dispute concerns the additive.

Appellant made twelve claims as to additives, which it groups in three groups, one describing the additives by the method of manufacture, one describing them by molecular structure, and the other being general in description but specifying a halogen....

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