The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2025
Filed:
Oct. 07, 2020
Nof Corporation, Shibuya-ku, JP;
Masatomo Takahashi, Oita, JP;
Shunsuke Sakurai, Yokosuka, JP;
Hiroko Kawasaki, Kawasaki, JP;
Takanori Fujita, Oita, JP;
NOF CORPORATION, Shibuya-ku, JP;
Abstract
The present invention relates to a surface treatment agent for soft contact lens, containing a reaction product obtained through a reaction between a poly(meth)acrylic acid which has an average molecular weight of 1,000 to 2,000,000, and a copolymer (P) which is obtained through polymerization of a specified hydrophilic monomer (n) and a specified reactive monomer (n), wherein in the copolymer, the hydrophilic monomer (n) is 80 to 99 mol %, the reactive monomer (n) is 1 to 20 mol %, and a weight average molecular weight is 10,000 to 5,000,000. The surface treatment agent tremendously enhances surface hydrophilicity of a soft contact lens to improve discomfort.