US Patent Issued to 3M Innovative Properties on Sept. 30 for "High contrast optical film and devices including the same" (Minnesota, Washington Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,643, issued on Sept. 30, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"High contrast optical film and devices including the same" was invented by Adam D. Haag (Woodbury, Minn.), Timothy J. Nevitt (Red Wing, Minn.), Carl A. Stover (St. Paul, Minn.), Andrew J. Ouderkirk (Kirkland, Wash.), Robert D. Taylor (Stacy, Minn.) and Zhaohui Yang (North Oaks, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Optical films are disclosed that include a plurality of interference layers. Each interference layer reflects or transmits light primarily by optical interference. The total number of the interference layers is less than about 1000. F...