Legal Opinion
Weatherchem Corporation v. J.L. Clark, Inc., Defendant/cross-Appellant
Court of Appeals for the Federal Circuit
Decided December 7, 1998No. 98-1064, 98-1078PublishedCited by 53 opinions
1Opinion of the Court
RADER, Circuit Judge.
In this patent infringement action, Weath-erchem Corporation (Weatherchem) asserted that J.L. Clark, Inc. (Clark) infringed U.S. Patent Nos. 4,693,399 (the ’399 patent) and 4,936,494 (the ’494 patent). Clark counterclaimed for a declaratory judgment of invalidity, unenforceability, and noninfringement. After a bench trial, the district court entered judgment declaring both patents invalid, holding the ’494 patent not infringed, and dismissing Weatherchem’s claims for infringement. See 937 F.Supp. 1262, 1290 (N.D.Ohio 1996). The district court’s opinion also implicitly…
2Cases cited19 opinions
- Graham v. John Deere Co. of Kansas CitySupreme Court of the United States · 1966
- Blonder-Tongue Laboratories, Inc. v. University of Illinois FoundationSupreme Court of the United States · 1971
- Kingsdown Medical Consultants, Ltd. And E.R. Squibb & Sons, Inc. v. Hollister IncorporatedCourt of Appeals for the Federal Circuit · 1988
- Cardinal Chemical Co. v. Morton International, Inc.Supreme Court of the United States · 1993
- Molins Plc, and John Coventry Smith, Jr. v. Textron, Inc., Kearney & Trecker Corporation, and Avco CorporationCourt of Appeals for the Federal Circuit · 1995
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3Cited by53 opinions
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- Richard Ruiz and Foundation Anchoring Systems, Inc., Plaintiffs-Cross v. A.B. Chance CompanyCourt of Appeals for the Federal Circuit · 2000
- Monon Corporation and Rosby Corporation, Plaintiffs-Cross v. Stoughton Trailers, Inc.Court of Appeals for the Federal Circuit · 2001
- Winner International Royalty Corporation v. Ching-Rong WangCourt of Appeals for the Federal Circuit · 2000
- Invitrogen Corp. v. Biocrest Manufacturing, l.p.Court of Appeals for the Federal Circuit · 2005
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