US Patent Issued to Essilor International on Aug. 11 for "Optical lens having an interferential coating and a multilayered system for improving abrasion-resistance" (French, Canadian Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,662, issued on Aug. 11, was assigned to Essilor International (Charenton-le-pont, France).

"Optical lens having an interferential coating and a multilayered system for improving abrasion-resistance" was invented by Frederic Guillain (Chatou, France), Benoit Emprin (Paris), Nicolas Maitre (Conflans-Sainte-Honorine, France) and William Trottier-Lapointe (Montreal).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, said rear main face of which being successively coated with: -(A) a first high refractive index sheet having a refractive index higher ...