Patents by Inventor John D. Stuber

John D. Stuber 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).

  • Acid treatment of poly(arylene sulfide) polymer reaction mixture
    Patent number: 5352768
    Abstract: A method is provided for producing a poly(arylene sulfide) polymer having reduced amounts of impurities by contacting a poly(arylene sulfide) polymerization reaction mixture with an acid.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: October 4, 1994
    Assignee: Phillips Petroleum Company
    Inventors: John D. Stuber, Wei-Teh W. Shang, Lacey E. Scoggins