Patents by Inventor Kevin Stavens

Kevin Stavens 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).

  • Publication number: 20080045676
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of a Ziegler-Natta-type catalyst system and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 21, 2008
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Robert Hagerty, Kevin Stavens, Marc DeChells, D. Fischbuch, James Farley
  • Publication number: 20070244279
    Abstract: This invention relates to a process to increase the amount of polymer solute in a polymerization medium or effluent comprising introducing a fluorocarbon into the polymerization medium or effluent in an amount effective to increase the amount of polymer solute in the polymerization medium or effluent by at least 3% without causing precipitation of polymer solute from the polymerization medium or effluent, as compared to the same polymerization medium or effluent without the fluorocarbon present. This invention also relates to a process to reduce the viscosity of a polymerization medium or effluent comprising introducing a fluorocarbon into the polymerization medium or effluent in an amount effective to reduce the viscosity of the polymerization medium or effluent by at least 3% without causing precipitation of polymer solute from the polymerization medium or effluent, as compared to the same polymerization medium or effluent without the fluorocarbon present.
    Type: Application
    Filed: June 20, 2005
    Publication date: October 18, 2007
    Applicant: EXXONMOBIL CHEMICAL PATENTS INC.
    Inventors: Peijun Jiang, John Shutt, Charles Speed, Randall Laird, Kevin Stavens, Robert Hagerty
  • Publication number: 20070208154
    Abstract: This invention is directed to a polymerization process that is carried out at relatively high productivity levels and with relatively low fouling. The process includes mixing together a catalyst system, at least one monomer and a hydrofluorocarbon to produce the polymer. The reaction is carried out such that little to no chlorine containing hydrocarbons are present.
    Type: Application
    Filed: June 20, 2005
    Publication date: September 6, 2007
    Inventors: Kevin Stavens, Robert Hagerty, Randall Laird, Zerong Lin, Michael Risch, Larry Iaccino
  • Publication number: 20070117939
    Abstract: A process for polymerizing one or more monomers is provided. In at least one specific embodiment, the process includes preparing a mixture comprising the one or more monomers, a catalyst system and a flourinated hydrocarbon, preferably a hydrofluorocarbon. A fluorinated hydrocarbon containing stream, a polymer product stream and a waste stream are recovered from the mixture. At least a portion of the waste stream is sent to a non-flare decomposition system to produce a destructed waste stream, and the destructed waste stream is released to atmosphere.
    Type: Application
    Filed: November 22, 2005
    Publication date: May 24, 2007
    Inventors: Larry Iaccino, Robert Hagerty, Kevin Stavens
  • Publication number: 20070004878
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Application
    Filed: September 5, 2006
    Publication date: January 4, 2007
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Robert Hagerty, Kevin Stavens, Marc DeChellis, D. Fischbuch, James Farley
  • Publication number: 20050267269
    Abstract: The present invention relates to a continuous gas phase process comprising polymerizing one or more hydrocarbon monomer(s) in a fluidized bed reactor in the presence of catalyst system or polymerization catalyst and a condensable fluid for a period of at least 12 hours where the bed temperature is less than the Critical Temperature and the dew point temperature of the gas composition in the reactor is within 25° C. of the bed temperature.
    Type: Application
    Filed: May 19, 2005
    Publication date: December 1, 2005
    Inventors: Robert Hagerty, Kevin Stavens, Marc DeChellis, Brett Fischbuch, James Farley