US Patent Issued to Essilor International on Nov. 25 for "Polymerizable and polymer compositions for an optical material having a refractive index of 1.54-1.58, ophthalmic lens and manufacturing method" (Thai Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,951, issued on Nov. 25, was assigned to Essilor International (Charenton-le-pont, France).

"Polymerizable and polymer compositions for an optical material having a refractive index of 1.54-1.58, ophthalmic lens and manufacturing method" was invented by Laurie Marion (Bangkok) and Pierre Fromentin (Bangkok).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a polymerizable composition intended to form a polymer composition for an optical material, such as a substrate of an ophthalmic lens, to this polymer composition obtained by polymerizing the polymerizable composition and having a refractive index of from 1.54 to 1.58, to an op...