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AMSTAR CORP. v. ENVIROTECH CORP.

Appeal No. 83-1090.

730 F.2d 1476 (1984)

AMSTAR CORPORATION, Plaintiff/Appellant, v. ENVIROTECH CORPORATION and Energy Fuels Nuclear, Inc., Defendants/Appellees.

United States Court of Appeals, Federal Circuit.

March 27, 1984.

Attorney(s) appearing for the Case

Gerald W. Griffin, New York City, for plaintiff/appellant. With him on the brief were Norman H. Zivin, New York City, and Donald B. Holbrook, Salt Lake City, Utah.

V. Bryan Medlock, Jr., Dallas, Tex., for defendants/appellees. With him on the brief was Ray G. Wilson, Dallas, Tex.

Before MARKEY, Chief Judge, and FRIEDMAN and DAVIS, Circuit Judges.

MARKEY, Chief Judge.

Appeal from that part of a judgment of the United States District Court for the District of Utah finding non-infringement of U.S. Patent No. 3,523,889 ('889 patent). We reverse and remand.

Background

In January 1979, Amstar Corporation (Amstar) sued Envirotech Corporation (Envirotech) and Energy Fuels Nuclear, Inc. (EFN), charging infringement of process and apparatus...

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