M. H. Detrick Co. v. Chicago Fire Brick Co.

SPARKS, Circuit Judge.

By this action appellant sought injunctive relief and an accounting for damages arising from an alleged infringement of United States patent to Foltz, No. 1,747,822. The patent was issued February 18, 1930, on an application filed January 7, 1924, and was subsequently assigned to appellant. The1 defenses were invalidity and non-infringement. The court found each of the claims sued upon invalid, and dismissed the bill for lack of invention. From that decree this appeal is prosecuted.

The disclosures relate to furnace construction, and more particularly to that class which…