Patents by Inventor Charles H. Gates, Jr.

Charles H. Gates, Jr. 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).

  • Preparation of multimodal polyethylene
    Patent number: 7855255
    Abstract: Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C3-C10 ?-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 21, 2010
    Assignee: Equistar Chemicals, LP
    Inventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, Jr., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack
  • Preparation of multimodal polyethylene
    Publication number: 20090099316
    Abstract: Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C3-C10 ?-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.
    Type: Application
    Filed: December 4, 2008
    Publication date: April 16, 2009
    Inventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, JR., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack
  • Preparation of multimodal polyethylene
    Patent number: 7473745
    Abstract: Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C3-C10 ?-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: January 6, 2009
    Assignee: Equistar Chemicals, LP
    Inventors: Venki Chandrashekar, Mark P. Mack, Charles H. Gates, Jr., Charles S. Holland, Natalia Nagy, Sandor M. Nagy, Edward S. Vargas, Jean A. Merrick-Mack