Welsbach Light Co. v. Cosmopolitan Incandescent Gaslight Co.

KOHLSAAT, District Judge.

This is a motion for a preliminary injunction, based upon the alleged infringement by defendant of the first claim of letters patent No. 407,963, dated July 30, 1889, issued *649to Frederick L. and William Stepney Raw son, and now the property, through mesne assignments, of complainant. The subject-maiter of the patent is a process for strengthening, for the purpose of handling and transportation, what is commonly called the “Welsbach” incandescent mantle, and said claim 1 reads as follows:

“The herein-described improvement in strengthening incandescent mantles, consisting…