Patents by Inventor Peter A. C. Smith

Peter A. C. Smith 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).

  • Modified vinyl chloride polymers
    Patent number: 4127618
    Abstract: The impact strength of rigid vinyl halide polymers is greatly improved by graft blending therewith up to 50 parts by weight of a butyl rubber composition per hundred parts of vinyl chloride monomer. The graft blends are prepared by polymerizing vinyl chloride monomer in the presence of the butyl rubber by suspension polymerization. This impact enhancement is not gained at the expense of other properties, e.g., processability.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: November 28, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventors: Thomas H. Sutherland, Peter A. C. Smith