US Patent Issued to Johns Manville on Feb. 3 for "Roofing membrane compositions based on a metallocene-catalyzed alpha-olefin polyethylene" (Colorado Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,236, issued on Feb. 3, was assigned to Johns Manville (Denver).

"Roofing membrane compositions based on a metallocene-catalyzed alpha-olefin polyethylene" was invented by Diego Pedrazzoli (Littleton, Colo.), Lichih R Peng (Littleton, Colo.), Changqing Shen (Centennial, Colo.), Lance Wang (Parker, Colo.) and Jawed Asrar (Englewood, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a roofing membrane composition comprising metallocene-catalyzed alpha-olefin polyethylene and a random polypropylene copolymer. The polymer blend is quite useful in a roofing membrane which exhibits excellent performance. The excellent performance is particula...