Court of Appeals for the Seventh Circuit June 7, 1935, No. 5325 (M. H. Detrick Co. v. Chicago Fire Brick Co.)

SPARKS, Circuit Judge.

This is an appeal from a decree dismissing appellant’s bill of complaint which charged appellee with infringement of four patents. Only three of the patents are involved in the appeal. They are Hosbein, No. 1,544,580, issued July 7, 1925, on an application filed August 3, 1921; Stevens and Hosbein, No.