US Patent Issued to TOKUYAMA on Aug. 4 for "Photochromic compound, photochromic curable composition, cured body, lens and eyeglasses" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,208, issued on Aug. 4, was assigned to TOKUYAMA Corp. (Shunan, Japan).

"Photochromic compound, photochromic curable composition, cured body, lens and eyeglasses" was invented by Masayuki Miyazaki (Shunan, Japan), Katsuhiro Mori (Shunan, Japan) and Junji Momoda (Shunan, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention aims to provide a photochromic compound capable of exhibiting photochromic properties regardless of matrix, and the compound is stably dispersed without aggregation in a process of molding (curing) an optical base material. According to the present invention, a polymer photochromic compound, which has a block po...