PHILLIPS, Chief Judge.
This is an appeal from the decision of the District Court wherein Westwood Chemical, Inc. was held to be estopped from asserting the validity of claims 5, 10, 12 and 13 of United States Patent No. 2,742,378. We affirm.
For an extensive discussion of the facts of this case reference is made to the opinion of District Judge William K. Thomas, reported at 181 U.S.P.Q. 134 (N.D. Ohio 1973). A summary of the pertinent facts will be stated...
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