Patents by Inventor Elizabeth A. Legg

Elizabeth A. Legg 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).

  • Incipient wetness method to enhance productivity of supported Ziegler-Natta catalysts
    Patent number: 9403956
    Abstract: Processes for producing impact copolymers are provided. Ethylene and at least one comonomer can be polymerized in the presence of one or more catalysts, polypropylene particles, and an inert solvent to produce an impact copolymer. The polypropylene particles can have a weight average particle size along the longest cross-sectional length thereof of about 0.05 mm to about 5 mm and a pore volume of less than 80%. The inert solvent can be present in a volume amount of about 0.1 to about 2 times the pore volume of the polypropylene particles.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: August 2, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Sudhin Datta, Mosha H. Zhao, Elizabeth A. Legg
  • Incipient Wetness Method to Enhance Productivity of Supported Ziegler-Natta Catalysts
    Publication number: 20140221515
    Abstract: Processes for producing impact copolymers are provided. Ethylene and at least one comonomer can be polymerized in the presence of one or more catalysts, polypropylene particles, and an inert solvent to produce an impact copolymer. The polypropylene particles can have a weight average particle size along the longest cross-sectional length thereof of about 0.05 mm to about 5 mm and a pore volume of less than 80%. The inert solvent can be present in a volume amount of about 0.1 to about 2 times the pore volume of the polypropylene particles.
    Type: Application
    Filed: January 20, 2014
    Publication date: August 7, 2014
    Inventors: Sudhin Datta, Mosha H. Zhao, Elizabeth A. Legg