ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,884, issued on April 14, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).
"Linerless film stack" was invented by Jeffrey O. Emslander (Grant, Minn.), Huiwen Tai (Lake Elmo, Minn.) and John A. Nielsen (Woodbury, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A film stack is described. In particular, a film stack that includes a co-extrudable first base substrate, a first pressure sensitive adhesive, a release layer, a second pressure sensitive adhesive, and a second base substrate is described. Such film stacks may benefit from reduced waste, simpler manufacturing, and a thinner overall construction versus conventional film stac...