Patents by Inventor Ronald L. Halterman

Ronald L. Halterman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Olefin polymerization
    Patent number: 5705579
    Abstract: A catalyst system comprising an unbridged bis(2-aryltetrahydro-indenyl) metallocene and a cocatalyst and its use in the polymerization of olefins, especially olefins having 3 or more carbon atoms.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 6, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Gil R. Hawley, Timothy M. Ramsey, Ronald L. Halterman, Darryl R. Fahey