Court of Appeals for the Fourth Circuit February 8, 1941, No. 4726 (Slayter & Co. v. Stebbins-Anderson Co.)

SOPER, Circuit Judge.

This suit was brought to enjoin the alleged infringement of the Slayter Reissued Patent No. 19,929 entitled “Method of Heat Insulating”. The specification of the patent describes a method for the insulation of buildings which consists of forcibly blowing into the dead air space between the outer sheathing and the inner laths of the walls an insulating material composed of