Patents Represented by Attorney Theodore V. Kawalchyn

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  • Viscosity modifier polymers
    Patent number: 5543469
    Abstract: The present invention relates to hydrogenated block copolymers of butadiene and at least one other diene, preferably isoprene. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: August 6, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Mark J. Struglinski, Gary W. Ver Strate, Lewis J. Fetters