Raytheon Co. v. Roper Corp.
United States Court of Appeals for the Federal Circuit
724 F.2d 951, 220 U.S.P.Q. 592 (1983)
- Written by Eric Miller, JD
Facts
Roper Corporation (defendant) held a patent on an oven known as a common-cavity oven. The oven operated in three modes—thermal cooking, microwave cooking, and self-cleaning—without a risk of explosion. The patent also claimed that the oven included a means of continuing convection during occasional autoignition. Raytheon Company (plaintiff) sought a declaratory judgment that the patent was invalid. Roper counterclaimed for infringement. The federal district court found that convection did not in fact occur during autoignition. Although only one of the patent’s claims addressed the convection issue, the court held that the patent as a whole was invalid on the ground of lack of utility. Roper appealed to the United States Court of Appeals for the Federal Circuit.
Rule of Law
Issue
Holding and Reasoning (Markey, C.J.)
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