Patents by Inventor George J. Briggs

George J. Briggs 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).

  • Polymer-carbon black mixing
    Patent number: 4395501
    Abstract: A process is provided for the production of vulcanizates having improved properties wherein polymer (or polymers) is mixed with carbon black in two separate steps such that in one step a major proportion of the carbon black to be used is mixed with polymer and in a second step a zero to minor proportion of the carbon black to be used is mixed with polymer. Such improved vulcanizates may be used, for example, in tires or a variety of mechanical goods.
    Type: Grant
    Filed: August 4, 1981
    Date of Patent: July 26, 1983
    Assignee: Polysar Limited
    Inventors: George J. Briggs, Yung-Kang Wei
  • Processing green strength polymers
    Patent number: 4222906
    Abstract: An improved method is provided for processing of rubbers in which one of the rubbers is a synthetic green strength polymer, the improvement being the addition of the synthetic green strength polymer at the second stage of mixing rather than at the prior art first stage. The method can be used for preparing rubber compounds whenever a synthetic green strength polymer is used as one component of the rubber compound.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: September 16, 1980
    Assignee: Polysar Limited
    Inventors: George J. Briggs, Yung-Kang Wei