Minnesota Mining & Manufacturing Co. v. Coe

ARNOLD, Associate Justice.

Plaintiff is the assignee of one Jewett who filed an application for a patent in 1933. The discovery involved is the process of obtaining a colored coating on granules, at comparatively low temperature, which will not form efflorescent salt under adverse weather conditions and thus wash away or discolor. The product is principally useful as a roofing material.

This is a suit under Section 4915, R.S., 35 U.S.C.A. § 63, to compel the allowance of a large number of claims, all of them intended to enlarge the scope of a patent approved in 1939 by the District Court of the…