Patents by Inventor Hanako Kato

Hanako Kato 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).

  • Polyalkoxysiloxane and process for its production
    Patent number: 6258969
    Abstract: A polyalkoxysiloxane of the following rational formula: SiOa(OR)b(OH)c wherein R is a C1-4 alkyl group, a=0.86 to 1.30, b=2.18 to 1.30, and c≦0.10.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: July 10, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takeshi Sawai, Hanako Kato, Seiichiro Tanaka, Akihiro Takazawa, Haruo Katsumata, Hozumi Endo
  • Process for producing a high purity synthetic quartz
    Patent number: 6131409
    Abstract: A method for producing a high purity synthetic quartz powder, characterized by using a tetramethoxysilane having a trimethoxymethylsilane content of at most 0.3 wt %, and converting it to a synthetic quartz by a sol-gel method.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 17, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoshio Katsuro, Takanobu Katsuki, Akihiro Takazawa, Hanako Kato, Akira Utsunomiya
  • Ultrafine reactive silica particles, suspension containing the same, and hard coating composition
    Patent number: 5800606
    Abstract: A suspension containing a novel reactive ultrafine particulate silica having a radius of gyration of at most 10 .ANG., has an excellent storage stability, and provides excellent various properties as a hard coating composition.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: September 1, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Seiichiro Tanaka, Hanako Kato, Takeshi Sawai, Nobuyuki Matsuzoe
  • Curable composition and method for preparing the same
    Patent number: 5733644
    Abstract: A curable composition comprising an aged mixture of tetramethoxysilane with water added in excess of the theoretical amount sufficient for the hydrolysis and condensation of 100% of the silane and a reactive organic compound having at least two functional groups capable of condensing with the product of hydrolysis and condensation of the silane in the above mixture.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: March 31, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Seiichiro Tanaka, Hanako Kato, Takeshi Sawai, Nobuyuki Matsuzoe, Kenji Oba, Yukio Kajiwara, Hozumi Endo