Patents by Inventor Richard J. Sonnenfeld

Richard J. Sonnenfeld 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).

  • Continuous solution polymerization process
    Patent number: 4311803
    Abstract: A continuous solution polymerization process for polymerizing conjugated dienes alone or with a copolymerizable monovinylarene in the presence of a gel inhibitor employing a first stirred reactor in series with a following plug-flow tube reactor.
    Type: Grant
    Filed: August 26, 1980
    Date of Patent: January 19, 1982
    Assignee: Phillips Petroleum Company
    Inventors: Richard L. Smith, Ralph C. Farrar, Richard J. Sonnenfeld
  • Hydrocarbon fuels with carburetor detergent properties
    Patent number: 4238202
    Abstract: Carburetor detergency properties of hydrocarbon fuels are provided by nitrogen-containing organic compound-grafted, hydrogenated conjugated diene-monovinylarene copolymers.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: December 9, 1980
    Assignee: Phillips Petroleum Company
    Inventors: William J. Trepka, Richard J. Sonnenfeld
  • Hydrocarbon fuels with carburetor detergent properties
    Patent number: RE32533
    Abstract: Carburetor detergency properties of hydrocarbon fuels are provided by nitrogen-containing organic compound-grafted, hydrogenated conjugated diene-monovinylarene copolymers.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: October 27, 1987
    Assignee: Phillips Petroleum Company
    Inventors: William J. Trepka, Richard J. Sonnenfeld