Patents by Inventor Serena K. Stephenson

Serena K. Stephenson 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).

  • Polymerization process and raman analysis for olefin-based polymers
    Patent number: 9040605
    Abstract: The invention provides a process for monitoring and/or adjusting a dispersion polymerization of an olefin-based polymer, the process comprising monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy. The invention also provides a process for polymerizing an olefin-based polymer, the process comprising polymerizing one or more monomer types, in the presence of at least one catalyst and at least one solvent, to form the polymer as a dispersed phase in the solvent; and monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: May 26, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Kishori Deshpande, Serena K. Stephenson, Ravindra S. Dixit
  • POLYMERIZATION PROCESS AND RAMAN ANALYSIS FOR OLEFIN-BASED POLYMERS
    Publication number: 20130261224
    Abstract: The invention provides a process for monitoring and/or adjusting a dispersion polymerization of an olefin-based polymer, the process comprising monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy. The invention also provides a process for polymerizing an olefin-based polymer, the process comprising polymerizing one or more monomer types, in the presence of at least one catalyst and at least one solvent, to form the polymer as a dispersed phase in the solvent; and monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy.
    Type: Application
    Filed: December 21, 2011
    Publication date: October 3, 2013
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Kishori Deshpande, Serena K. Stephenson, Ravindra S. Dixit
  • Method for monitoring monomer concentration in interfacial polycarbonate manufacturing process
    Patent number: 8426531
    Abstract: The present invention relates to an improved process for online measurement of monomer concentration, specifically bisphenol A, in an interfacial polycarbonate manufacturing process. Wherein the measurement is obtained by vibrational spectroscopy for the purpose of improving process control, specifically, controlling the carbonate polymer molecular weight.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: April 23, 2013
    Assignee: Styron Europe GmbH
    Inventors: Jean P. Chauvel, Jr., John O. Osby, Wenzel P. Bartlett, Serena K. Stephenson, John S. Hanson, Jeffery S. Bradley, Walter D. Leatherwood, Rajesh P. Paradkar, Thoi H. Ho
  • Method for Monitoring Monomer Concentration In Interfacial Polycarbonate Manufacturing Process
    Publication number: 20120041158
    Abstract: The present invention relates to an improved process for online measurement of monomer concentration, specifically bisphenol A, in an interfacial polycarbonate manufacturing process. Wherein the measurement is obtained by vibrational spectroscopy for the purpose of improving process control, specifically, controlling the carbonate polymer molecular weight.
    Type: Application
    Filed: February 24, 2010
    Publication date: February 16, 2012
    Inventors: Jean Chauvel, JR., John O. Osby, Wenzel P. Bartlett, Serena K. Stephenson, John S. Hanson, Jeffery S. Bradley, Walter D. Leatherwood, Rajesh P. Paradkar, Thoi H. Ho