Patents Represented by Attorney Nancy Krawczyk

Find this attorney in the Justia Lawyer Directory

  • Halogenated polymers with new sequence distributions
    Patent number: 7491773
    Abstract: The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel halogenated polymers with new sequence distributions. In particular, the invention relates to halogenated copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: February 17, 2009
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy Daniel Shaffer, David Yen-Lung Chung