Patents by Inventor Charles John Pearson

Charles John Pearson 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).

  • Patent number: 6329467
    Abstract: It has been unexpectedly found that greatly improved properties for tire rubbers, such as lower hysteresis, can be attained by coupling the rubber with both a tin halide, such as tin tetrachloride, and a silicon halide, such as silicon tetrachloride. Even better characteristics for use in tire tread compounds can be realized by asymmetrically coupling the rubbery polymer. This invention more specifically discloses a coupled rubbery polymer which is particularly valuable for use in manufacturing tire tread compounds, said coupled rubbery polymer being comprised of (1) tin atoms having at least three polydiene arms covalently bonded thereto and (2) silicon atoms having at least three polydiene arms covalently bonded thereto.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: December 11, 2001
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Adel Farhan Halasa, Wen-Liang Hsu, Charles John Pearson, Yi Feng