Court of Appeals for the Seventh Circuit November 28, 1934, 5070 (Weil Pump Co. v. Chicago Pump Co.)

SPARKS, Circuit Judge.

This is a patent infringement suit, involving claims 1, 2, 4, and 9

1

of Patent No.

*14

1,666,873. The patent, which covers a duplex pumping apparatus, was issued April 17,1928, to A. C. Durdin, Jr., on an application filed by him April 27, 1927.

The defenses are invalidity and non-infringement. The alleged invalidity is based on (1) prior ar.t, (2) non-compliance with R. S.