General Chemical Co. v. Selden Co.

BUFFINGTON, Circuit Judge.

In the court below the General Chemical Company, owner of patent No. 1,371,004, applied for October 9,1914, and granted March 8,1921, to Franz Slama, a citizen of Austria, and Hans Wolf, of Germany, charged the Selden Company with infringement thereof. That court held the seventh claim void and the other claims not infringed. Thereupon plaintiff took this appeal.

The patent concerns the manufacture of sulphuric acid. Reference to the exhaustive opinion of the trial judge, reported in (D. C.) 60 F.(2d) 144, and to a pase in this court, Monsanto Chemical Works v.…