US Patent Issued to Johns Manville on April 14 for "Hybrid roofing membrane and methods of making same" (Colorado Inventors)

ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,117, issued on April 14, was assigned to Johns Manville (Denver).

"Hybrid roofing membrane and methods of making same" was invented by Diego Pedrazzoli (Littleton, Colo.), Lichih R Peng (Littleton, Colo.), Lance Wang (Parker, Colo.) and Jawed Asrar (Englewood, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A roofing membrane includes a thermoplastic polyolefin (TPO) layer and a polyvinyl chloride (PVC) layer. The TPO layer forms a bottom layer of the roofing membrane, and the PVC layer is positioned atop the TPO layer so that the PVC layer forms a top layer of the roofing membrane. The TPO layer and the PVC layer are configured to be chemical...