Patents by Inventor Kazuko Takezawa

Kazuko Takezawa 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).

  • Column packing material and method for producing the same
    Patent number: 7329386
    Abstract: The first subject of this invention is a column packing material comprising: a silica gel having a silanol group; a first chemical modification group which is bound to said silanol group; a silicone polymer for coating the surface of said silica gel; and, a trimethylsilyl group which is bound to the silanol group on said silicone polymer and/or the silanol group on said silica gel.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: February 12, 2008
    Assignee: Shiseido Co., Ltd.
    Inventors: Atsushi Kobayashi, Kazuko Takezawa, Hideki Takasaki, Taketoshi Kanda, Isao Tanaka, Tomoko Kimura, Yutaka Ohtsu
  • Column packing material and method for production thereof
    Publication number: 20040043493
    Abstract: The first subject of this invention is a column packing material comprising:
    Type: Application
    Filed: April 8, 2003
    Publication date: March 4, 2004
    Inventors: Atsushi Kobayashi, Kazuko Takezawa, Hideki Takasaki, Taketoshi Kanda, Isao Tanaka, Tomoko Kimura, Yutaka Ohtsu