ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,533, issued on July 29, was assigned to LG CHEM Ltd. (Seoul, South Korea).
"Curable composition and optical material" was invented by Hee Jung Choi (Daejeon, South Korea), Jeewoo Lim (Daejeon, South Korea), Heon Kim (Daejeon, South Korea), Donghwa Seo (Daejeon, South Korea) and Yeongrae Chang (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A curable composition for forming a high refractive index optical material, the curable composition comprising an episulfide compound; sulfur-containing organic particles comprising a specific content of sulfur atoms; and a reducing agent, and an optical material comprising the curable composi...