Patents by Inventor William L. Winniford

William L. Winniford 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).

  • CHROMATOGRAPHY OF POLYOLEFIN POLYMERS
    Publication number: 20110152499
    Abstract: A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Applicant: Dow Global Technologies Inc.
    Inventors: William L. Winniford, Rongjuan Cong, Theodore M. Stokich, JR., Randy J. Pell, Matthew D. Miller, Abhishek Roy, Freddy Van Damme, Alexander W. Degroot, John W. Lyons, David M. Meunier
  • CHROMOTOGRAPHY OF POLYOLEFIN POLYMERS
    Publication number: 20100093964
    Abstract: A method and apparatus for chromatography of a polyolefin polymer by flowing a solution of the polyolefin polymer through liquid flowing through a graphitic carbon liquid chromatography stationary phase. The method can be used to determine the monomer to comonomer ratio of a polyolefin copolymer such as a copolymer of ethylene and 1-octene or a copolymer of propylene and ethylene.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 15, 2010
    Inventors: Freddy A. Van Damme, John W. Lyons, William L. Winniford, Alexander Willem deGroot, Matthew D. Miller