Patents by Inventor Jinya Takeuchi

Jinya Takeuchi 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).

  • Gel for the separation of useful components contained in rhodanate-containing detoxication treated liquid and method of separation using said gel
    Patent number: 4737290
    Abstract: The present invention provides a gel having excellent separation ability, operability and a long life, for separating useful components from a rhodanate-containing detoxication treated liquid. The gel consists of a cross-linked polymer with more than 50 weight % of repeating units which are composed of 2,3-dioxypropyl (meth)acrylate or 2,3-dioxypropyl (meth)allyl ether, and whose average particle diameter is more than 10.mu. and gel water content is from 30 to 150%. The present invention also provides a method of separation using said gel.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: April 12, 1988
    Assignee: Japan Exlan Company, Limited
    Inventors: Toshiyuki Kobashi, Hideo Naka, Jinya Takeuchi
  • Method of producing hard polyvinyl alcohol gel
    Patent number: 4725646
    Abstract: Hard polyvinyl alcohol gel is produced by copolymerizing a carboxylic acid vinyl ester monomer with a particular cross-linking agent and then saponifying the copolymer. This hard polyvinyl alcohol gel has excellent mechanical strength and separation ability and has no problem in copolymerizability and polymerization speed. Moreover, it shows no change in cross-linked structure before and after saponification.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: February 16, 1988
    Assignee: Japan Exlan Company, Limited
    Inventors: Toshiyuki Kobashi, Hideo Naka, Jinya Takeuchi