Patents Represented by Attorney Womble Carlyle Sandrice & Rice, PLLC

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  • Metallocenes, polymerization catalyst systems, their preparation, and use
    Patent number: 6992035
    Abstract: Metallocene having two cyclic dienyl groups connected by a single carbon having an aryl substituent and a terminally unsaturated hydrocarbyl substituent, olefin polymerization catalyst systems prepared therefrom, and the use of such catalyst systems are disclosed.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: January 31, 2006
    Assignee: Phillips Petroleum Company
    Inventors: M. Bruce Welch, Syriac J. Palackal, Bryan E. Hauger, David W. Dockter, Alexander Köppl, Helmut G. Alt