MUMBAI, India, Nov. 7 -- Intellectual Property India has published a patent application (202537100708 A) filed by Tokuyama Corporation, Yamaguchi, Japan, on Oct. 17, for 'photochromic compound, naphthol derivative, curable composition, optical article, lens, and eyeglass.'
Inventor(s) include Miyazaki Masayuki.
The application for the patent was published on Nov. 7, under issue no. 45/2025.
According to the abstract released by the Intellectual Property India: "The purpose of the present invention is to provide: a photochromic compound having excellent temperature dependency and an excellent color fading rate; a naphthol derivative that can be an intermediate for the photochromic compound; and a curable composition, an optical article, a...