American Cyanamid Co. v. Hercules Inc.

OPINION

CALEB M. WRIGHT, Chief Judge.

This is a civil action brought under 35 U.S.C.A. § 281 (1952) for infringement of a patent. Plaintiff, the American Cyanamid Company (Cyanamid), is the owner of United States Letters Patent No. 2,595,935 (’935) for “Wet Strength Paper and Process for the Production Thereof.” The ’935 patent issued to plaintiff on May 6, 1952 as the assignee of John H. Daniels, Jr., and Chester G. Landes. Plaintiff alleges the infringement of the patent by the defendant, *369Hercules Incorporated (Hercules). Two defenses are raised — non-infringement and invalidity.

Cyanamid is a…