Patents by Inventor Jessica Ann Cook

Jessica Ann Cook 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).

  • 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
  • Spray-drying compositions and methods of spray-drying
    Patent number: 6458738
    Abstract: A spray-dryable composition is provided, comprising a catalyst compound, an activator for the catalyst compound, and at least one compound selected from among siloxanes, polyethylene glycols and crown ethers, the composition optionally further comprising a filler. There are further provided a method of spray-drying such a composition, and polymerization processes which employ such spray-dried compositions.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: October 1, 2002
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Jessica Ann Cook
  • MIXED ZIEGLER/METALLOCENE CATALYSTS FOR THE PRODUCTION OF BIMODAL POLYOLEFINS
    Publication number: 20020037979
    Abstract: A self-supported hybrid olefin polymerization catalyst comprising a Ziegler-Natta component and a metallocene component whereby the metallocene component is affixed to the Ziegler-Natta component is disclosed. In the hybrid catalyst, the Ziegler-Natta component includes a solid complex of magnesium, transition metal, and alkoxide moieties where the transition metal is selected from one or more metals having an oxidation state of +3, +4, +5, and mixtures thereof. A method of making the hybrid catalyst and a method of polymerizing olefins using the hybrid catalyst also are disclosed. The hybrid catalyst is capable of producing polyolefins having a broad molecular weight, or bimodal distribution in high yield.
    Type: Application
    Filed: December 28, 1999
    Publication date: March 28, 2002
    Inventors: ROBERT CHARLES JOB, JESSICA ANN COOK, SUN-CHUEH KAO