US Patent Issued to HOYA LENS THAILAND on June 3 for "Coating composition for optical article, spectacle lens, spectacles, and method for producing spectacle lens, and optical article and method for producing optical article" (Japanese Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,839, issued on June 3, was assigned to HOYA LENS THAILAND LTD. (Pathumthani, Thailand).

"Coating composition for optical article, spectacle lens, spectacles, and method for producing spectacle lens, and optical article and method for producing optical article" was invented by Takuya Shimada (Tokyo) and Teruo Yamashita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A coating composition for an optical article containing a photochromic compound and two or more (meth)acrylates, the two or more (meth)acrylates containing a non-cyclic difunctional methacrylate having a molecular weight of 500 or more and a non-cyclic tri- or higher functional (meth...