Patents by Inventor Richard J. Sperley

Richard J. Sperley 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).

  • Reinforced rubber composition containing ground coal
    Patent number: 4477611
    Abstract: A reinforced rubber composition is provided comprising a mixture of (a) a sulfur vulcanizable rubber and (b) ground coal having an average mesh size of 25 or more and which produces an aqueous slurry with a pH of less than 7.0, and wherein a metallic reinforcing member is embedded in the rubber mixture of (a) and (b).
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: October 16, 1984
    Assignee: Uniroyal, Inc.
    Inventor: Richard J. Sperley