US Patent Issued to HOYA LENS THAILAND on Sept. 23 for "Optical article and method for producing optical article" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,365, issued on Sept. 23, was assigned to HOYA LENS THAILAND LTD. (Pathumthani, Thailand).

"Optical article and method for producing optical article" was invented by Takuya Shimada (Tokyo), Kei Kobayashi (Tokyo), Teruo Yamashita (Tokyo) and Tsuyoshi Watanabe (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an optical article having a substrate, a primer layer generated by curing a polymerizable composition for forming the primer layer, and a photochromic layer generated by curing a (meth)acrylate-based polymerizable composition containing a photochromic compound in this order, in which the polymerizable composition for forming the p...