Patents by Inventor James H. Kawakami

James H. Kawakami 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-imides
    Patent number: 3988374
    Abstract: A series of polyamide-imides which are both tractable and soluble in polar solvents as well as stable at high temperatures has been prepared by the condensation polymerization of aromatic diamines or oligomers containing oxygen, sulfone, and optionally alkylidene linkages with trimellitic acid, trimellitic acid anhydride or trimellitic anhydride acid chloride.
    Type: Grant
    Filed: September 21, 1971
    Date of Patent: October 26, 1976
    Assignee: Union Carbide Corporation
    Inventors: George L. Brode, James H. Kawakami