Patents by Inventor Russell K. Griffith

Russell K. Griffith 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).

  • Thermoplastic nitrile resins
    Patent number: 4022957
    Abstract: Thermoplastic polymers having high heat-distortion temperatures and low permeability to gases and vapors are prepared by copolymerizing in a specified manner an olefinic nitrile, such as acrylonitrile, with a small amount of a conjugated diene, such as butadiene.
    Type: Grant
    Filed: May 23, 1973
    Date of Patent: May 10, 1977
    Assignee: Standard Oil Company
    Inventor: Russell K. Griffith
  • Manufacture of impact-resistant olefinic-nitrile copolymers
    Patent number: 3974239
    Abstract: Impact-resistant polymers which have low permeability to gases and vapors are prepared by polymerizing an olefinic nitrile, such as acrylonitrile, optionally with an acrylic ester, such as methyl acrylate, to at least about 70% conversion, and then introducing into the polymerization reaction medium a conjugated diene monomer, such as butadiene-1,3, and completing the polymerization reaction in the presence of said diene monomer.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: August 10, 1976
    Assignee: Standard Oil Company
    Inventors: Russell K. Griffith, John F. Jones
  • Manufacture of impact-resistant olefinic-nitrile copolymers
    Patent number: 3956246
    Abstract: Impact-resistant polymers, which have low permeability to gases and vapors, are prepared by polymerizing methacrylonitrile with styrene to at least about 70% conversion and then introducing into the polymerization reaction medium a conjugated diene monomer, such as butadiene-1,3 and optionally styrene or methacrylonitrile, and completing the polymerization reaction.
    Type: Grant
    Filed: May 4, 1972
    Date of Patent: May 11, 1976
    Assignee: Standard Oil Company
    Inventors: Russell K. Griffith, John F. Jones