Patents by Inventor Shigeki Ideguchi

Shigeki Ideguchi 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 absorbent material and absorbent article using same
    Patent number: 6969750
    Abstract: The water absorbent material of the present invention is composed of a copolymer of an anhydropolyamino acid having at least one ethylenically unsaturated double bond in a molecule, a water-soluble monomer having an ethylenically unsaturated double bond and polysaccharides, and has high water absorption ratio and high water absorption rate in pure water or water having a low ion content and also has high absorption properties for high concentration salt-containing solutions.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: November 29, 2005
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Hisakazu Tanaka, Toshiya Kato, Shigeki Ideguchi, Hideyuki Ishizu, Yoshiki Hasegawa
  • Water absorbent material and absorbent article using same
    Publication number: 20050171309
    Abstract: The water absorbent material of the present invention is composed of a copolymer of an anhydropolyamino acid having at least one ethylenically unsaturated double bond in a molecule, a water-soluble monomer having an ethylenically unsaturated double bond and polysaccharides, and has high water absorption ratio and high water absorption rate in pure water or water having a low ion content and also has high absorption properties for high concentration salt-containing solutions.
    Type: Application
    Filed: April 5, 2005
    Publication date: August 4, 2005
    Applicant: DAINIPPON INK AND CHEMICALS, INC.
    Inventors: Hisakazu Tanaka, Toshiya Kato, Shigeki Ideguchi, Hideyuki Ishizu, Yoshiki Hasegawa
  • Water absorbent material
    Patent number: 6653399
    Abstract: A water absorbent material, comprising, as a main component, a water absorbent resin which has a structure in which a anhydropolyamino acid having an ethylenically unsaturated double bond is grafted with polysaccharides, wherein at least a portion of the anhydropolyamino acid is hydrolyzed and crosslinked, has high water absorbency and high biodegradability even if the anhydropolyamino acid has a low molecular weight.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: November 25, 2003
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Hisakazu Tanaka, Shigeki Ideguchi, Yoshiki Hasegawa
  • Water-absorbing material and absorbent article employing the same
    Publication number: 20030045198
    Abstract: The water absorbent material of the present invention is composed of a copolymer of an anhydropolyamino acid having at least one ethylenically unsaturated double bond in a molecule, a water-soluble monomer having an ethylenically unsaturated double bond and polysaccharides, and has high water absorption ratio and high water absorption rate in pure water or water having a low ion content and also has high absorption properties for high concentration salt-containing solutions.
    Type: Application
    Filed: March 22, 2002
    Publication date: March 6, 2003
    Inventors: Hisakazu Tanaka, Toshiya Kato, Shigeki Ideguchi, Hideyuki Ishizu, Yoshiki Hasegawa
  • Water absorbent material
    Publication number: 20020161110
    Abstract: A water absorbent material, comprising, as a main component, a water absorbent resin which has a structure in which a anhydropolyamino acid having an ethylenically unsaturated double bond is grafted with polysaccharides, wherein at least a portion of the anhydropolyamino acid is hydrolyzed and crosslinked, has high water absorbency and high biodegradability even if the anhydropolyamino acid has a low molecular weight.
    Type: Application
    Filed: February 26, 2002
    Publication date: October 31, 2002
    Applicant: DAINIPPON INK AND CHEMICALS, INC.
    Inventors: Hisakazu Tanaka, Shigeki Ideguchi, Yoshiki Hasegawa