Patents by Inventor Tetsunosuke Kunitomo

Tetsunosuke Kunitomo 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).

  • Anti-thrombogenic blood treating system
    Patent number: 5254249
    Abstract: An anti-thrombogenic blood treating system, comprising selectively permeable hollow yarn membranes made of a composition containing a copolymer with polyethylene oxide component, and headers, catheters and circuits respectively covered on the blood contact surface with a heparinized hydrophilic copolymer containing vinyl chloride as a component monomer or a hydrophilic copolymer with polyethylene oxide component, in combination. All the blood contact surfaces are made anti-thrombogenic to allow, for the first time, the long-time extracorporeal circulation without intracorporeal administration of heparin.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: October 19, 1993
    Assignee: Toray Industries, Inc.
    Inventors: Ryozo Terada, Kazumi Tanaka, Tetsunosuke Kunitomo
  • Hemodialysis method and membrane
    Patent number: 4925534
    Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta..sub.2 -microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta..sub.2 -microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: May 15, 1990
    Assignee: Toray Industries Inc.
    Inventors: Hiroshi Kataoka, Tetsunosuke Kunitomo, Takuichi Kobayashi
  • Hemodialysis membrane
    Patent number: 4834882
    Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta.2-microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta.2-microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: May 30, 1989
    Assignee: Toray Industries, Inc.
    Inventors: Hiroshi Kataoka, Tetsunosuke Kunitomo, Takuichi Kobayashi
  • Column for removing .beta..sub.2 -microglobulin
    Patent number: 4770774
    Abstract: A column comprising an insoluble carrier and an anti-.beta..sub.2 -microglobulin antibody immobilized to the carrier can specifically adsorb and remove .beta..sub.2 -microglobulin in the blood. This column is useful for the prevention and treatment of diseases such as carpal tunnel syndrome observed in patients undergoing blood dialysis.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: September 13, 1988
    Assignee: Toray Industries, Inc.
    Inventors: Nobuo Ida, Hiroshi Kataoka, Tetsunosuke Kunitomo
  • Cross-linked n-vinyl pyrrolidone polymer composition suitable for contact lenses
    Patent number: 3949021
    Abstract: Contact lens having high water content make from polymer of cross-link-polymerized N-vinyl pyrrolidone in the presence of water-insoluble polymer has excellent properties suitable for continuous wearing for a long period of time.
    Type: Grant
    Filed: August 7, 1974
    Date of Patent: April 6, 1976
    Assignee: Toray Industries, Inc.
    Inventors: Tetsunosuke Kunitomo, Hideki Kenjo, Syoji Nagaoka, Takeshi Yoshioka, Hiroshi Tanzawa