No. 02-1497.

329 F.3d 1358 (2003)

DAYCO PRODUCTS, INC., Plaintiff-Appellant, v. TOTAL CONTAINMENT, INC., Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

May 23, 2003.

Attorney(s) appearing for the Case

Constance S. Huttner, Skadden, Arps, Slate, Meagher & Flom, LLP, of New York, New York, argued for plaintiff-appellant. With her on the brief were Edward V. Filardi and Douglas R. Nemec.

Randolph J. Huis, Volpe and Koenig, P.C., of Philadelphia, Pennsylvania, argued for defendant-appellee. With him on the brief was John J. O'Malley.

Before MAYER, Chief Judge, MICHEL, and DYK, Circuit Judges.

DYK, Circuit Judge.

Dayco Products Inc. ("Dayco") appeals from the decision of the United States District Court for the Western District of Missouri granting summary judgment of unenforceability of U.S. Patent Nos. 5,199,752 ("the '752 patent"), 5,297,822 ("the '822 patent"), 5,380,050 ("the '050 patent"), and 5,486,023 ("the '023 patent") (collectively "the patents-in-suit") and granting summary judgment of invalidity as to certain claims of those patents. Dayco...

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