Patents by Inventor Kawashima Yasuhiko

Kawashima Yasuhiko 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).

  • Ink jet recording head and ink jet recording apparatus employing the same
    Patent number: 6692105
    Abstract: An ink jet recording head comprises an ink jetting nozzle and a peripheral area of the ink jetting nozzle, the peripheral area having been coated with a coating composition comprising a graft copolymer and a hardener, and having been hardened to provide a hardened coat layer, wherein the graft copolymer is obtained by polymerizing 15 to 70% by weight of a radical polymerizable fluorine-containing resin (a) having a radical polymerizable unsaturated bond through a urethane bond, 10 to 40% by weight of a radical polymerizable polysiloxane (b) having a radical polymerizable double bond on one end thereof represented by formula (1) or (2), and 15 to 75% by weight of a radical polymerizable monomer (c), each being based on the total weight of the radical polymerizable fluorine-containing resin (a), the radical polymerizable polysiloxane (b) and the radical polymerizable monomer (c).
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: February 17, 2004
    Assignee: Konica Corporation
    Inventors: Nomori Hiroyuki, Kawashima Yasuhiko, Hirano Tadashi, Ohkubo Kenichi
  • Ink jet recording head and ink jet recording apparatus employing the same
    Publication number: 20020101477
    Abstract: An ink jet recording head comprises an ink jetting nozzle and a peripheral area of the ink jetting nozzle, the peripheral area having been coated with a coating composition comprising a graft copolymer and a hardener, and having been hardened to provide a hardened coat layer, wherein the graft copolymer is obtained by polymerizing 15 to 70% by weight of a radical polymerizable fluorine-containing resin (a) having a radical polymerizable unsaturated bond through a urethane bond, 10 to 40% by weight of a radical polymerizable polysiloxane (b) having a radical polymerizable double bond on one end thereof represented by formula (1) or (2), and 15 to 75% by weight of a radical polymerizable monomer (c), each being based on the total weight of the radical polymerizable fluorine-containing resin (a), the radical polymerizable polysiloxane (b) and the radical polymerizable monomer (c).
    Type: Application
    Filed: October 3, 2001
    Publication date: August 1, 2002
    Inventors: Nomori Hiroyuki, Kawashima Yasuhiko, Hirano Tadashi, Ohkubo Kenichi