ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,631, issued on Sept. 9, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).
"Multilayer film with integrally formed liner" was invented by Martin Johan Olof Widenbrant (Stillwater, Minn.), Jeffrey O. Emslander (Grant, Minn.) and Kevin T. Huseby (Oakdale, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multilayer film having a backing with an integrally formed polymeric liner, made in a common coextrusion process. The polymeric liner has material properties deemed to make it incompatible with the backing material, resulting in two layers that resist separation during manufacture and transportation but are hand separable in field a...