Patents by Inventor John S. Hanson

John S. Hanson 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).

  • 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