MUMBAI, India, Nov. 7 -- Intellectual Property India has published a patent application (202537100318 A) filed by Tokuyama Corporation, Yamaguchi, Japan, on Oct. 16, for 'photochromic compound, propargyl alcohol compound, curable composition, optical article, lens, and spectacles.'
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 an excellent color fading rate and excellent durability; a propargyl alcohol compound that can serve as an intermediate for this photochromic compound; and a curable composition, an optical...