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CHEMCAST CORP. v. ARCO INDUSTRIES CORP.

No. 90-1078.

913 F.2d 923 (1990)

CHEMCAST CORPORATION, Plaintiff-Appellant, v. ARCO INDUSTRIES CORPORATION, Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

September 4, 1990.

Attorney(s) appearing for the Case

Neal A. Waldrop, of Neal A. Waldrop & Associates, Troy, Mich., argued for plaintiff-appellant. With him on the brief was Malcolm R. McKinnon.

Jeanne-Marie Buiteweg, of Reising, Ethington, Barnard, Perry & Milton, Troy, Mich., argued for defendant-appellee. With her on the brief was Owen E. Perry.

Before ARCHER and MAYER, Circuit Judges, and GEORGE, District Judge.

OPINION

MAYER, Circuit Judge.

Chemcast Corporation appeals the judgment of the United States District Court for the Eastern District of Michigan that Claim 6 of United States Patent No. 4,081,879 ('879 patent), the only claim in suit, is invalid because of the inventor's failure to disclose the best mode as required by 35 U.S.C. § 112. See 12 USPQ2d 2005 (1989). We affirm.

Background

The '879 patent claims a sealing member...

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