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PENNWALT CORP. v. AKZONA INC.

Appeal Nos. 83-1417, 84-505.

740 F.2d 1573 (1984)

PENNWALT CORPORATION, Appellee/Cross-Appellant, v. AKZONA INCORPORATED and Armak Company, Appellants/Cross-Appellees.

United States Court of Appeals, Federal Circuit.

August 10, 1984.

Attorney(s) appearing for the Case

Phillip H. Mayer, Chicago, Ill., argued for appellants. With him on the brief were Gordon R. Coons and Stephen B. Heller, Chicago, Ill.

John G. Mulford, Wilmington, Del., of counsel.

Arthur H. Seidel, Philadelphia, Pa., argued for appellee. With him on the brief was Daniel A. Monaco, Philadelphia, Pa., of counsel.

Before KASHIWA, BENNETT and MILLER, Circuit Judges.

JACK R. MILLER, Circuit Judge.

Akzona, Incorporated, and its subsidiary, Armak Company (both hereafter referred to as "Armak"), appeal from the decision of the United States District Court for the District of Delaware ("district court")1 that U.S. Patent No. 4,107,2922 ("Nemeth patent") is invalid and that Pennwalt Corporation ("Pennwalt") is not liable under contract and equity counterclaims of Armak based...

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