Patents by Inventor Takayuku Ota

Takayuku Ota 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).

  • Production of aliphatic copolyesters
    Patent number: 5652325
    Abstract: Aliphatic polyester copolymers, which have molecular weights high enough for practical use and which are excellent in thermal stability, tensile strength and moldability, and which are biodegradable as well, are provided, which are produced by a process comprising effecting polycondensation of an aliphatic diol and an aliphatic dicarboxylic acid in the presence of an aliphatic monohydroxymonocarboxylic acid in a specific amount and of a catalyst comprising a germanium compound.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: July 29, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Keiko Miyazaki, Hiroshi Noguchi, Takayuku Ota, Atsushi Kasai, Hiroaki Yamaoka