Patents by Inventor John Joseph Bielak

John Joseph Bielak 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 catalysts containing a pyrrole bisimine ligand
    Patent number: 6984602
    Abstract: Polydentate substituted pyrrole based chelants, metal complexes containing the same, olefin polymerization catalyst compositions, and polymerization processes using the same.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: January 10, 2006
    Assignee: Univation Technologies, LLC
    Inventors: Jessica Cook, Inna Shulman, John Joseph Bielak
  • Transition metal complexes containing sulfur ligands, and polylefin production processes using them
    Publication number: 20030216246
    Abstract: A metal complex comprising a transition metal complex of a bidentate or tridentate, dithioether ligand having utility as a catalyst component of an olefin polymerization catalyst composition in combination with an activating co-catalyst.
    Type: Application
    Filed: March 17, 2003
    Publication date: November 20, 2003
    Inventors: Jessica A Cook, John Joseph Bielak
  • Transition metal precursors containing sulfur ligands, and polyolefin production processes using them
    Patent number: 6511934
    Abstract: A catalyst composition for the polymerization of olefins is provided, comprising a transition metal precursor containing sulfur ligands and an activating co-catalyst.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: January 28, 2003
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Jessica Ann Cook, John Joseph Bielak