Court of Appeals for the Eighth Circuit January 13, 1972, 71-1161, 71-1162 (Flour City Architectural Metals v. Alpana Aluminum Products, Inc., Alpana Aluminum Products, Inc. v. Flour City Architectural Metals)

BRIGHT, Circuit Judge.

This controversy concerns the validity of the United States Patent No. 3,289,-377 (the Alpana patent). This patent relates to a thermally insulated frame designed for use in metal windows or doors. In consolidated suits between the patent holder, Alpana Aluminum Products, Inc.