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ENVIRONMENTAL DESIGNS v. UNION OIL CO. OF CAL.

Appeal No. 83-554.

713 F.2d 693 (1983)

ENVIRONMENTAL DESIGNS, LTD. and the Trentham Corporation, Appellants, v. UNION OIL COMPANY OF CALIFORNIA and Ralph M. Parsons Co., Appellees.

United States Court of Appeals, Federal Circuit.

July 25, 1983.

Attorney(s) appearing for the Case

B.R. Pravel, Houston, Tex., argued for appellants. With him on the brief were John R. Kirk, Jr., and Charles M. Cox, Houston, Tex., of counsel.

Andrew J. Belansky, Pasadena, Cal., argued for appellees. With him on the brief were John P. Grinnell and Leo J. Young, Pasadena, Cal., of counsel.

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

MARKEY, Chief Judge.

Appeal from a judgment of the District Court for the Central District of California holding claims 1-8 and 12 valid and infringed. We affirm.

Background

In early 1975, Trentham Corporation (Trentham), the sole general partner of Environmental Designs, Ltd. (Environmental), announced the construction of an effluent gas treating plant using the Trencor process. On March 22, 1976, Environmental sought a declaratory judgment...

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