Patents by Inventor David Rolfing

David Rolfing 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).

  • Polymerization catalysts for producing polymers with low levels of long chain branching
    Publication number: 20070287814
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging ?5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Application
    Filed: December 1, 2006
    Publication date: December 13, 2007
    Applicant: Chevron Phillips Chemical Company, L.P.
    Inventors: Michael Jensen, Joel Martin, Max McDaniel, David Rolfing, Qing Yang, Matthew Thorn, Ashish Sukhadia, Youlu Yu, Jerry Lanier
  • Polymerization catalysts for producing polymers with low levels of long chain branching
    Publication number: 20050288461
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging ?5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Application
    Filed: June 25, 2004
    Publication date: December 29, 2005
    Inventors: Michael Jensen, Joel Martin, Qing Yang, Matthew Thorn, Max McDaniel, David Rolfing, Ashish Sukhadia, Youlu Yu, Jerry Lanier
  • Polymerization catalysts for producing polymers with low levels of long chain branching
    Publication number: 20050288462
    Abstract: This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging ?5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.
    Type: Application
    Filed: June 25, 2004
    Publication date: December 29, 2005
    Inventors: Michael Jensen, Joel Martin, Max McDaniel, David Rolfing, Qing Yang, Matthew Thorn, Ashish Sukhadia, Youlu Yu, Jerry Lanier