Patents by Inventor Manabu Tsuzuki

Manabu Tsuzuki 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).

  • Polyvinylacetal resin and process for producing the same
    Patent number: 7385005
    Abstract: A polyvinylacetal resin powder with a low metal content, being excellent in transparency, moisture resistance and electrical insulating properties and having a large specific surface area, and a process for its production, are presented. A polyvinylacetal resin powder obtained by reacting polyvinyl alcohol and an aldehyde in the presence of an acid catalyst, which has an acetalization degree of at least 60 mol %, a specific surface area of from 1.50 to 3.50 m2/g, a bulk density of from 0.12 to 0.19 g/cm3, an average particle diameter of from 0.5 to 2, 5 ?m and a metal content of at most 80 ppm.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: June 10, 2008
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihiro Mashiko, Toshiaki Kawanishi, Koichi Matsunaga, Manabu Tsuzuki, Kazumasa Matsuoto, Koki Goto, Hitoshi Watanabe
  • Polyvinylacetal resin and process for producing the same
    Publication number: 20050159545
    Abstract: A polyvinylacetal resin powder with a low metal content, being excellent in transparency, moisture resistance and electrical insulating properties and having a large specific surface area, and a process for its production, are presented. A polyvinylacetal resin powder obtained by reacting polyvinyl alcohol and an aldehyde in the presence of an acid catalyst, which has an acetalization degree of at least 60 mol %, a specific surface area of from 1.50 to 3.50 m2/g, a bulk density of from 0.12 to 0.19 g/cm3, an average particle diameter of from 0.5 to 2, 5 ?m and a metal content of at most 80 ppm.
    Type: Application
    Filed: February 7, 2003
    Publication date: July 21, 2005
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihiro Mashiko, Toshiaki Kawanishi, Koichi Matsunaga, Manabu Tsuzuki, Kazumasa Matsuoto, Koki Goto, Hitoshi Watanabe