Patents by Inventor Keith Dackson

Keith Dackson 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).

  • Membrane separation system, and uses thereof
    Patent number: 11401251
    Abstract: Provided herein are membrane separation systems and methods suitable for use in separating carbonylation catalyst from a beta-lactone product stream. Such membrane separation systems utilize a cross flow separation technique and employ a sweep stream.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: August 2, 2022
    Assignee: Novomer, Inc.
    Inventor: Keith Dackson
  • MEMBRANE SEPARATION SYSTEM, AND USES THEREOF
    Publication number: 20220089556
    Abstract: Provided herein are membrane separation systems and methods suitable for use in separating carbonylation catalyst from a beta-lactone product stream. Such membrane separation systems utilize a cross flow separation technique and employ a sweep stream.
    Type: Application
    Filed: March 9, 2020
    Publication date: March 24, 2022
    Inventor: Keith Dackson
  • Ethylene/?-olefin copolymer made with a non-single-site/single-site catalyst combination, its preparation and use
    Patent number: 7101939
    Abstract: An ethylene/?-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an ?-olefin content of 5 to 20 percent by weight and shows at least two CRYSTAF peak temperatures differing by at least 15° C. and/or at least two DSC melting peak temperatures differing by at least 15° C.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: September 5, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Thomas Edward Nowlin, Pradeep P. Shirodkar, Robert Ivan Mink, Gary M. Diamond, Jill Helaine Paul, Lawrence T. Kale, Keith Dackson
  • Ethylene/alpha-olefin copolymer made with a non-single-site/single-site catalyst combination, its preparation and use
    Publication number: 20050054791
    Abstract: An ethylene/?-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an ?-olefin content of 5 to 20 percent by weight aud shows at least two CRYSTAF peak temperatures differing by at least 15° C. and/or at least two DSC melting peak temperatures differing by at least 15° C.
    Type: Application
    Filed: October 11, 2002
    Publication date: March 10, 2005
    Inventors: Thomas Nowlin, Pradeep Shirodkar, Robert Mink, Gary Diamond, Jill Paul, Lawrence Kale, Keith Dackson
  • Method for preparaing polyolefins
    Publication number: 20040242808
    Abstract: A method is disclosed for preparing broad or bimodal molecular weight distribution polyolefins having a targeted property, such as, flow index, melt flow ratio, or weight fractions of higher or lower molecular weight components. The method uses a bimetallic catalyst containing a metallocene component and a non-metallocene component, and the activities of the metallocene and non-metallocene portions are controlled by adjusting the ratio of organoaluminum and modified methylaluminoxane cocatalyst. The method allows for monitoring and adjustment of polyolefin properties on a real-time basis, as the polyolefin is forming.
    Type: Application
    Filed: March 11, 2004
    Publication date: December 2, 2004
    Inventors: Robert I Mink, Thomas E. Nowlin, Kenneth G. Schurzky, Keith dackson, Sandra D Schregenberger, Pradeep P Shirodkar