Patents by Inventor Richard L. Markham

Richard L. Markham 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).

  • Optically transparent elastomers
    Patent number: 4603158
    Abstract: A novel optically clear combination which is a composition of matter is disclosed. The disclosed composition is an EPDM vulcanizate of remarkable clarity, the formulation of which involves a synergistic combination of EPDM elastomer, fumed silica, coupling agent, antioxidant, at least one and preferably two curing coagents, and preferably an antistatic agent.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: July 29, 1986
    Assignee: Battelle Development Corporation
    Inventors: Richard L. Markham, William J. Mueller