Patents by Inventor Yoshiko Aoyama

Yoshiko Aoyama 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).

  • Thermoplastic polyester resin composition
    Patent number: 4814366
    Abstract: Disclosed herein is a thermoplastic polyester resin composition comprising a thermoplastic polyester resin and an amount effective in ultraviolet screening of at least one of naphthalenetetracarboxylic acids, acid anhydrides thereof, imides thereof and esters thereof.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: March 21, 1989
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Takuji Hirahara, Takashi Nakamura, Yoshiko Aoyama, Shuichi Maeda