ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,037, issued on Sept. 22, was assigned to Transitions Optical Ltd. (Tuam, Ireland).
"Curable photochromic composition" was invented by Ramaiahgari Reddy (Murrysville, Pa.) and Anil Kumar (Murrysville, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a curable photochromic composition including (a) a photochromic material, (b) an active hydrogen group-containing component of (i) an active hydrogen group-containing fluorinated polymer having an active hydrogen group equivalent weight ranging from 200 to 5000 g/mole and a number average molecular weight ranging from 5,000 to 50,000 g/mole, and (ii) a polymer having at least t...