Patents by Inventor John T. Stapler

John T. Stapler 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 from hexahydrobenzodipyrrole
    Patent number: 3959232
    Abstract: Novel compounds having the following structural formulae: ##SPC1##Are disclosed and polymers formed by condensing the above compounds with anic diacids are prepared which polymers are useful in forming thermally stable, flame-resistant fibers and films.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: May 25, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John T. Stapler, Joseph Bornstein