Patents by Inventor Kiran Gupte

Kiran Gupte 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).

  • Cascaded polyolefin slurry polymerization employing disengagement vessel between reactors
    Publication number: 20050261471
    Abstract: A disengagement vessel employing a lock hopper effectively reduces concentration of non-polymer-associated components in the polymer product slurry of a first olefin slurry polymerization reactor, allowing cascading of a second slurry polymerization reactor operating at lesser concentration of comonomers, hydrogen, and other components to produce multicompositional polyolefin polymers and/or polymers having a multimodal monomer distribution, e.g. diblock polymers having substantially non-overlapping comonomer contents between the blocks.
    Type: Application
    Filed: June 3, 2005
    Publication date: November 24, 2005
    Applicant: Equistar Chemicals L.P.
    Inventors: Joel Mutchler, Kiran Gupte, Michael Treptau
  • Supported catalysts which reduce sheeting in olefin polymerization, process for the preparation and the use thereof
    Patent number: 6884749
    Abstract: Olefin polymerization in the presence of heterogeneous supported catalysts is improved by incorporating into the supported catalyst a unifunctional hydrophobic tether comprising a hydrophobic portion containing no basic nitrogen and a univalent reactive group. The unifunctional hydrophobic tether reduces fouling and sheeting in gas phase polymerization processes and improves polymer morphology and bulk density in slurry polymerization processes, while substantially maintaining or enhancing catalyst polymerization activity.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: April 26, 2005
    Assignee: Equistar Chemicals L.P.
    Inventors: Karen L. Neal-Hawkins, Sandor M. Nagy, William J. Sartain, Kiran Gupte, Kenneth W. Johnson