US Patent Issued to 3M Innovative Properties on Sept. 15 for "Optical film, reflective polarizer, optical stack, and optical construction" (Minnesota Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,736,732, issued on Sept. 15, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Optical film, reflective polarizer, optical stack, and optical construction" was invented by Kristopher J. Derks (Woodbury, Minn.), David J. McDaniel (Lino Lakes, Minn.), Kevin T. Huseby (Oakdale, Minn.) and Stephen A. Johnson (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical film includes a plurality of polymeric microlayers disposed between, and co-extruded and co-stretched with, opposing first and second polymeric skins. Each of the polymeric microlayers has an average thickness of less than about 400 nm. Each of the first and secon...