Legal Opinion
Arrowhead Industrial Water, Inc. v. Ecolochem, Inc.
Court of Appeals for the Federal Circuit
Decided May 6, 1988No. 87-1626PublishedCited by 200 opinions
1Opinion of the Court
MARKEY, Chief Judge.
Appeal from an order of the United States District Court for the Northern District of Illinois, Eastern Division, No. 87-C-3839 (August 24, 1987), that dismissed a complaint of Arrowhead Industrial Water, Inc. (Arrowhead), seeking a declaratory-judgment of invalidity, unenforceability, and noninfringement of U.S. Patent No. 4,556,492 (’492 patent) owned by Ecolo-chem, Inc. (Ecolochem). We reverse and remand.
Background
Arrowhead and Ecolochem compete in providing water treatment services. On December 3,1985, the ’492 patent issued to Ecolochem for “Deoxygenation Process.”
In…
2Cases cited17 opinions
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- Grafon Corporation v. Elmer P. Hausermann and Marten C. HausermannCourt of Appeals for the Seventh Circuit · 1979
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3Cited by200 opinions
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