Patents by Inventor Bridge A. Spence

Bridge A. Spence 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).

  • Core functionalized star block copolymers
    Patent number: 5461116
    Abstract: A core functionalized star block copolymer formed of a vinyl aromatic hydrocarbon and/or a conjugated diene and a polyalkenyl aromatic coupling agent wherein the core functionalization is provided by reaction of the star polymer core with an asymmetric bi- or polyfunctional capping agent.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: October 24, 1995
    Assignee: Shell Oil Company
    Inventors: Ronald J. Hoxmeier, Bridge A. Spence, Jeffrey G. Southwick