Patents by Inventor Thomas Spriggs

Thomas Spriggs 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
    Publication number: 20060155081
    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: Application
    Filed: March 4, 2004
    Publication date: July 13, 2006
    Inventors: Robert Jorgensen, Karen Breetz, Jose Cevallos-Candau, Dale Wright, Thomas Spriggs