Patents Represented by Attorney Shawn Foster

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  • Polymerization process and polymer composition
    Patent number: 7297747
    Abstract: Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is different from hydrogen.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: November 20, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James R. Hart, William T. Haygood, Terry J. Burkhardt, Robert T. Li