Patents by Inventor Yuuzi Naitou

Yuuzi Naitou 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).

  • Polyamide acid, process for producing same and polyimide obtained therefrom
    Patent number: 4454310
    Abstract: Polyamide acid obtained by reacting 2,3,5-tricarboxycyclopentane-acetic acid and a diamine in a solvent has a high stability in the form of a solution, has a high workability and is excellent in storage stability. Polyimide obtained by heating said polyamide acid is excellent in heat resistance, mechanical properties, electrical properties and chemical resistance.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: June 12, 1984
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hiroshi Oka, Yoshinori Yoshida, Yuuzi Naitou