US Patent Issued to Essilor International on Sept. 23 for "Late-stage catalysis of fast room-temperature polymerizations" (French Inventor)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,503, issued on Sept. 23, was assigned to Essilor International (Charenton-le-Pont, France).

"Late-stage catalysis of fast room-temperature polymerizations" was invented by Aref Jallouli (Charenton-le-Pont, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a method of fast curing transparent casted substrate, usable for making optical articles such as ophthalmic lenses, which comprises the steps of:-providing a fast room-temperature polymerizable composition:-providing a catalyst composition;-providing a casting mold assembly containing two unsealed molds each having an inside surface and an outside surface; an...