ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,216, issued on April 7, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).
"Optical film" was invented by Carl A. Stover (St. Paul, Minn.), Lin Zhao (Woodbury, Minn.), Gilles J. Benoit (Minneapolis) and Robert D. Taylor (Stacy, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical film includes a plurality of polymeric layers. A plot of an average layer thickness versus a layer number of the polymeric layers includes a knee region separating a left region including at least N1 sequentially arranged polymeric layers where the polymeric layers have lower layer numbers from a middle region including at least N2 sequentially arran...