Patents by Inventor Takenori Asajima

Takenori Asajima 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).

  • Polycarbonate resin compositions with improved transparency
    Patent number: 3945979
    Abstract: Compositions comprising a polycarbonate resin and a mixture of anthraquinone series colorants have excellent transparency.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: March 23, 1976
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Haruo Kobayashi, Takenori Asajima, Yoshihiro Narita