Patents by Inventor Charles R. Wilkinson

Charles R. Wilkinson 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).

  • Oxidized asphalt rubber system
    Patent number: 5342866
    Abstract: The present invention provides an elastomeric-asphalt composition which does not phase separate and which is compatible at high temperatures. This compatible material can be produced without the need to use high shear milling equipment. The elastomeric-asphalt composition is not limited by the tendency of other elastomer polymers to be incompatible with asphalt nor does the composition separate into a polymer-rich phase and an asphalt-rich phase. In a preferred embodiment, the elastomeric materials are SBS and SIS block copolymers.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: August 30, 1994
    Assignee: Owens-Corning Fiberglas Technology Inc.
    Inventors: David C. Trumbore, Michael R. Franzen, Charles R. Wilkinson