US Patent Issued to DDP SPECIALTY ELECTRONIC MATERIALS US, DUPONT SAFETY & CONSTRUCTION on July 28 for "Flame-resistant shield for protected membrane roofs" (Virginia, Michigan Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,657, issued on July 28, was assigned to DDP SPECIALTY ELECTRONIC MATERIALS US LLC (Wilmington, Del.) and DUPONT SAFETY & CONSTRUCTION INC. (Wilmington, Del.).

"Flame-resistant shield for protected membrane roofs" was invented by Arash Sahbaee (Richmond, Va.), Greg Stewart (Midland, Mich.) and Valentina Woodcraft (Midland, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An inverted roof membrane assembly comprising: a) a waterproofing membrane suitable for direct or indirect mounting on top of a roof decking, b) at least one layer of the polymer foam insulation board directly or indirectly on top of a), c) a flame-resistant fabric shield directl...