The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1976
Filed:
May. 14, 1975
Applicant:
Inventors:
Sherman A Stewart, Rancho Palos Verdes, CA (US);
Estel R Snyder, La Grange, IL (US);
David L Ruff, Harbor City, CA (US);
Assignee:
Grefco, Inc., Bala Cynwyd, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04D / ;
U.S. Cl.
CPC ...
52 58 ; 52273 ; 52309 ;
Abstract
A roofing system comprising a fire resistant rigid class, a fire rated board as a substrate having bonded thereto a sheet of foamed, insulating resin and having a tough weather resistant membrane bonded to the upper surface. A ledge of substrate about 1/2 inch wide protrudes beyond the formed sheet to enable the composite to be fastened to a steel roof or the like by mechanical fasteners. The channel formed by the abutting roofing panels is filled with insulating foam and covered with a membrane strip which is attached at its edges to the membrane surface of the roofing panel.