Patents by Inventor James C. Randall, Jr.

James C. Randall, Jr. 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).

  • Impact-modified polymers (p-1304)
    Patent number: 5066723
    Abstract: Impact-modified polymeric materials are produced by visbreaking certain reactor blends. In a preferred embodiment, impact-modified polypropylene materials are produced by visbreaking a reactor blend of polypropylene and thermoplastic polyethylene. The polypropylene material is preferably homopolypropylene having a melt flow rate of less than about 1 dg/min. Such impact-modified polymeric materials manifest unexpected compatibility characteristics, increased impact resistance at low temperatures, improved antiblush characteristics and improved flow characteristics.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: November 19, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: James C. Randall, Jr., Terrence Huff
  • Modified polypropylene, process for making and article made from the same
    Patent number: 4950720
    Abstract: A modified polypropylene having a substantially isotactic homopolypropylene and a propylene/olefin random copolymer, the modified polypropylene including up to about 50 chain disruptors per 1000 propylene repeat units. The chain disruptors are racemic polypropylene diads and olefin, the olefin being incorporated into the high end of the molecular weight distribution of the modified polypropylene.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: August 21, 1990
    Assignee: Exxon Chemical Patents Inc.
    Inventors: James C. Randall, Jr., Ferdinand C. Stehling, Michael C. Chen, Larry W. Colwell