Court of Appeals for the Seventh Circuit January 20, 1910, No. 1,627 (Neureuther v. Mineral Point Zinc Co.)

SEAMAN, Circuit Judge

(after stating the facts as above). The patent in suit, No. 666,390, was issued to the appellant January 22, 1901, for an “improvement in regenerative retort-heating furnaces,” having special reference to zinc-smelting furnaces.