Patents by Inventor Robert R. Barnhart

Robert R. Barnhart 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).

  • Elastomeric composition having reduced Mooney viscosity
    Patent number: 4192790
    Abstract: The viscosity of synthetic and/or natural elastomers is markedly reduced by incorporation of a particulate, finely-divided basic zinc methacrylate-type adjuvant, without adversely affecting the physical properties of the final vulcanizates. This viscosity reduction allows higher levels of fillers and other rubber compounding materials to be used for improved physical properties, while maintaining the level of compound viscosity necessary for processing.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: March 11, 1980
    Assignee: Uniroyal, Inc.
    Inventors: Paul H. McKinstry, Robert R. Barnhart