Patents by Inventor Philip H. Dougherty

Philip H. Dougherty 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).

  • Aramid containing friction materials
    Patent number: 4374211
    Abstract: The addition of aramid polymer pulp fiber to non-asbestos type friction material compositions results in a marked improvement in the flexural strength and structural integrity of preforms used in the manufacture of friction elements. The consequent handling characteristics of the preform lead to significant improvements in ease of manufacturing of the friction element.
    Type: Grant
    Filed: September 15, 1981
    Date of Patent: February 15, 1983
    Assignee: Thiokol Corporation
    Inventors: John P. Gallagher, Philip H. Dougherty