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OLIVER UNITED FILTERS v. SILVER

No. 4574.

206 F.2d 658 (1953)

OLIVER UNITED FILTERS, Inc. v. SILVER.

United States Court of Appeals Tenth Circuit.

July 23, 1953.

Attorney(s) appearing for the Case

Oscar A. Mellin, San Francisco, Cal. (Pershing, Bosworth, Dick & Dawson, Winston S. Howard, Denver, Colo., Leroy Hanscom, and Jack E. Hursh, San Francisco, Cal., on the brief), for appellant.

James P. Hume, Chicago, Ill. (James A. Woods and Charles J. Beise, Denver, Colo., on the brief), for appellee.

Before HUXMAN, MURRAH and PICKETT, Circuit Judges.

PICKETT, Circuit Judge.

Harold F. Silver is the owner of U. S. Letters Patent No. 2,390,131 issued December 4, 1945 and No. 2,468,720 issued April 26, 1949. These patents disclose an apparatus and process for extracting sugar solution from sugar beets known to the art as continuous diffusion. Oliver United Filters, Inc.1 brought this declaratory judgment action in which it prayed for a decree adjudging patent No. 2,390,131 invalid and...

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