1
Ottinger Lester V, Matzke William A: Method of manufacturing a molded composite urethane foam structural panel. Champion International Corporation, Sommer Esq Evelyn M, Heilman Esq James M, Casella Esq Anthony J, July 15, 1975: US3895087 (37 worldwide citation)

The invention covers a high quality structural building panel comprising a unique construction of high density and low density urethane foam faced with a weather resistant plastic film or sheet material surface, and with the method of manufacture wherein the supporting urethane foam is molded onto t ...


2
Ottinger Lester V: Method of manufacturing a foamed urethane structural product having high and low density portions. Champion International Corporation, Sommer Esq Evelyn M, Heilman Esq James M, Casella Esq Anthony J, March 18, 1975: US3872199 (32 worldwide citation)

Invention covers high quality molded urethane structural products comprising a unique mixture of a high density foam and a low density foam and a high speed process for manufacturing the same. In essence, two (or more) urethane formulations are spray applied from one (or more) bank of application no ...


3
Matzke William A: Textured film finished panels and method therefor. Sommer Esq Evelyn M, Heilman Esq James M, Casella Esq Anthony J, March 4, 1975: US3869326 (8 worldwide citation)

The present invention pertains to embossed decorative patterns and decorative laminates, particularly textured film finished structural elements and the method of manufacture wherein a resilient material such as a wadding sheet or pad sheet is interposed between the surface film and the substrate. H ...