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AMERICAN CYANAMID CO. v. MARZALL

No. 11096.

196 F.2d 24 (1952)

AMERICAN CYANAMID CO. v. MARZALL.

United States Court of Appeals District of Columbia Circuit.

Decided March 13, 1952.

Attorney(s) appearing for the Case

Mr. Edmund H. Parry, Jr., Washington, D. C., with whom Messrs. Elmer W. Harmon, Evans Kahn and Walter H. Schneider, all of Stamford, Conn., were on the brief, for appellant.

Mr. Clarence W. Moore, U. S. Patent Office, with whom Mr. E. L. Reynolds, Solicitor, United States Patent Office, was on the brief, for appellee.

Before EDGERTON, WILBUR K. MILLER and FAHY, Circuit Judges.

PER CURIAM.

Froth flotation was well known to the prior art. This is not disputed. The appellant's assignors put froth flotation to practical and successful use in the elimination of contaminants or solid particles from lubricating and cooling emulsions, called lubricating or emulsion coolants. The District Court in an action filed by appellant pursuant to Rev.Stat. § 4915 (1878), as amended, 35 U.S.C.A. § 63, found...

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