Fmc Corp. v. City of Greensboro

HAYES, District Judge.

The Forrest Patent No. 2,777,815, granted January 15, 1957, on an application filed June 8, 1953, embodies a sewage digestion process. It teaches the *495method of continuously injecting methane-containing digester gas under pressure near the bottom of the tank and at the center by releasing gas under prescribed conditions of force propelling it to the top of the surface and rolling it from the center to the circumference, down the sides of the container, back to the bottom and up again in the same circular, continuous movement. This method contemplated the inter-mixture of…