Patents by Inventor Karen E. Breetz

Karen E. Breetz 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).

  • Chromium-based catalysts in mineral oil for production of polyethylene
    Patent number: 7202313
    Abstract: A process for polymerizing polyethylene with chromium-based catalysts wherein one or more supported chromium-based catalysts is mixed with mineral oil to form a slurry and the slurry is then introduced into a polymerization reactor, especially a gas-phase polymerization reactor.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: April 10, 2007
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Robert J. Jorgensen, Karen E. Breetz, Jose Fernando Cevallos-Candau, Dale A. Wright, Thomas E. Spriggs