Patents by Inventor Masanori Kadoya

Masanori Kadoya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Water-absorptive contact lens
    Patent number: 5426133
    Abstract: 1. A water-absorptive contact lens obtained by saponification of a copolymer composed essentially of:(A) from 1 to 30% by weight of a (meth)acrylate polymer having at least one polymerizable group per molecule on an average obtained by copolymerizing (a) an alkyl (meth)acrylate and (b) a monomer having at least two polymerizable groups per molecule, as the main components;(B) from 1 to 10% by weight of a vinyl monomer selected from the group consisting of maleic acid esters and N-vinyl lactams;(C) from 50 to 98% by weight of a fatty acid vinyl ester; and(D) from 0.02 to 10% by weight of a cross linking monomer.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: June 20, 1995
    Assignee: Menicon Co., Ltd.
    Inventors: Yasuhito Hishida, Masanori Kadoya, Keiji Sugimoto, Tsuyoshi Watanabe, Noriko Iwata