Patents by Inventor Koichi Sanuki

Koichi Sanuki 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).

  • Process for producing polyester and block copolymer thereof
    Patent number: 4565845
    Abstract: Polyesters having a narrow molecular weight distribution and block copolymers having a narrow molecular weight distribution obtained from said polyesters can be produced by using a catalyst system comprising an aluminum porphyrin complex and an organic quaternary salt under mild reaction conditions.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: January 21, 1986
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Shohei Inoue, Takuzo Aida, Koichi Sanuki, Masahide Ishikawa