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DOW CHEMICAL CO. v. HALLIBURTON OIL WELL CEMENTING CO.

No. 9392.

139 F.2d 473 (1943)

DOW CHEMICAL CO. v. HALLIBURTON OIL WELL CEMENTING CO.

Circuit Court of Appeals, Sixth Circuit.

December 17, 1943.

Attorney(s) appearing for the Case

Wilber Owen, of Toledo, Ohio (Calvin A. Campbell, of Midland, Mich., Wilber Owen, of Toledo, Ohio, Russell Wiles, of Chicago, Ill., and Donald L. Conner, of Midland, Mich., on the brief), for appellant.

Leonard S. Lyon, of Los Angeles, Cal., and Earl Babcock, of Duncan, Okl. (Frederick S. Lyon and Leonard S. Lyon, both of Los Angeles, Cal., and Earl Babcock, of Duncan, Okl., on the brief), for appellee.

Before ALLEN, HAMILTON, and MARTIN, Circuit Judges.

ALLEN, Circuit Judge.

This appeal attacks a decree finding invalid for want of invention Grebe & Sanford patent, 1,877,504, of which appellant is assignee. The patent covers a method and process of "treatment of deep wells." By stipulation of the parties two other patents relating to the same subject, Grebe, 1,916,122, and Grebe & Stoesser, 1,998,756, were sustained, and the court found that the appellee infringed certain of the claims of each of them. The...

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