ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,271, issued on May 20, was assigned to Essilor International (Charenton-le-pont, France) and Corporation de l'Ecole Polytechnique de Montreal (Montreal).
"Item comprising an organic-inorganic layer with a low refractive index" was invented by Sebastien Chiarotto (Charenton-le-pont, France), Jolanta Klemberg-Sapieha (Montreal) and Martin Caron (Montreal).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an article comprising a substrate having at least one main surface coated with a layer L of a material M obtained by vacuum deposition, by co-evaporation, of at least one metallic compound A chosen from alkaline-earth metal fluori...