Legal Opinion
Black-Clawson Co. v. Centrifugal Engineering & Patents Corp.
Court of Appeals for the Sixth Circuit
Decided April 7, 1936No. 7207PublishedCited by 18 opinions
1Opinion of the Court
SIMONS, Circuit Judge.
In a patent suit involving claims for a process for purifying paper pulp, the defense of noninfringement having been waived, or the fact of infringement conceded, validity was alone in issue. The patent is one to Thomassen, No. 1,536,988, granted May 5, 1925, upon an application filed February 16, 1924, and belongs to the appellee, plaintiff below. Overruling defenses based on anticipation, double use, and the functional character of the claims, the District Court held the patent valid, and from the decree granting injunction and awarding damages the defendant appeals.
In…
2Cases cited9 opinions
- Carnegie Steel Co. v. Cambria Iron Co.Supreme Court of the United States · 1902
- Expanded Metal Co. v. BradfordSupreme Court of the United States · 1909
- Corning v. BurdenSupreme Court of the United States · 1854
- Risdon Iron & Locomotive Works v. MedartSupreme Court of the United States · 1895
- Holland Furniture Co. v. Perkins Glue Co.Supreme Court of the United States · 1928
4 more not listed; retrieve them via the Exa API.
3Cited by18 opinions
- United States Gypsum Co. v. Consolidated Expanded Metal CompaniesCourt of Appeals for the Sixth Circuit · 1942
- Application of Zoltan TARCZYHORNOCHCourt of Customs and Patent Appeals · 1968
- General Tire & Rubber Co. v. Fisk Rubber Corp.Court of Appeals for the Sixth Circuit · 1939
- In re NicholsCourt of Customs and Patent Appeals · 1948
- Bauer Bros. Co. v. Bogalusa Paper Co.Court of Appeals for the Fifth Circuit · 1938
13 more not listed; retrieve them via the Exa API.