MUMBAI, India, July 5 -- Intellectual Property India has published a patent application (202517057761 A) filed by Nof Corporation, Tokyo, on June 16, for 'copolymer, and composition for eyes.'
Inventor(s) include Sasaki, Ayano; Kawasaki, Hiroko; and Iwakiri, Norio.
The application for the patent was published on July 4, under issue no. 27/2025.
According to the abstract released by the Intellectual Property India: "The present invention provides a copolymer that can remain on the cornea or contact lens surface for a long time, maintaining water retention and lubricity for a long time. The present invention pertains to a copolymer containing a structural unit derived from a monomer (a) of formula (1a) or a salt thereof and from a monomer (b) of formula (1b) or (2b), and having an Mw of 10,000-2,000,000, wherein the molar ratio na:nb is 10:90 to 70:309. ?Formula 1? (R1 is H or CH3, X is O or NR2, R2 is H or a C1-4 alkyl group, and n=1-4.) ?Formula 2?(R3 is H or CH3, Y is O or NR4, R4 is H or a C1-4 alkyl group, m is 1-6, there may be a hydroxyl group in a carbon chain, and A is a phosphorylcholine group or a hydroxyl group, and may be H when m=1 or when there is a hydroxyl group in a carbon chain.) ?Formula 3? (R5 is H or CH3, R6 is a C1-4 alkyl group or an alkylene group that forms a cycling structure together with R5.)."
The patent application was internationally filed on Dec. 19, 2023, under International application No.PCT/JP2023/045409.
Disclaimer: Curated by HT Syndication.
