Patents Represented by Attorney M. Tully

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  • Betaine copolymers-viscosifiers for water and brine
    Patent number: 5153289
    Abstract: A water soluble copolymer having the structure: ##STR1## wherein X is about 1 to about 99 mole percent and y is about 99 to about 1 mole percent.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: October 6, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Donald N. Schulz, Kissho Kitano