Patents by Inventor Douglas C. Callander

Douglas C. Callander 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).

  • Using a solvent for in-situ formation of fibers in an elastomer
    Patent number: 5077338
    Abstract: A method of preparing a fiber reinforced elastomer by forming fibers therein in-situ and an elastomer made thereby are provided. In the method, a fiber forming material, preferably a high performance polymer, is dissolved in a compatible solvent to form a solvent/polymer mixture, and the mixture is added to the elastomer during compounding or mixing. The polymer is quickly dispersed into the elastomer, and the solvent rapidly evaporates. The shear of the mixer causes elongation of the polymer into fibers. The fibers may also be oriented by the shear of the mixer.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: December 31, 1991
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: William C. T. Tung, Deborah A. Tung, Mellis M. Kelley, Douglas C. Callander, 1