Patents by Inventor Kiyoshi Okitu

Kiyoshi Okitu 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).

  • Polyesteramide
    Patent number: 4663428
    Abstract: A polyesteramide is prepared by reacting(1) at least one polyamide-forming compound selected from the group consisting of amino carboxylic acids having 6 to 12 carbon atoms, lactams having 6 to 12 carbon atoms and nylon salts comprising dicarboxylic acids having 4 to 12 carbon atoms and diamines having 4 to 12 carbon atoms,(2) a dicarboxylic acid having 4 to 54 carbon atoms, and(3) a polycaprolactonediol having an average molecular weight of 200 to 2,500 or 4,500 to 10,000; and is good at heat stability.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: May 5, 1987
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kiyoshi Okitu, Shiogi Watanabe