Patents by Inventor Richard T. E. Sylvester

Richard T. E. Sylvester 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).

  • Polyolefin-metal laminate
    Patent number: 8404352
    Abstract: A laminate and a process for making it are disclosed. The laminate comprises a metal substrate and a polymer layer that adheres to at least one plasma-treated surface of the metal substrate. The polymer layer comprises a blend of a first polyolefin and a grafted polyolefin. The laminate can be prepared by plasma-treating at least one surface of a metal substrate and extruding onto the plasma-treated surface a polymer layer comprising a blend of a first polyolefin and a grafted polyolefin.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: March 26, 2013
    Assignee: Equistar Chemicals, LP
    Inventors: Thomas J. Schwab, Steven A. Schwartz, Maged G. Botros, Charles S. Holland, Robert S. Weber, Richard T. E. Sylvester, Neil W. Morris
  • Modification of polyethylene with ozone
    Patent number: 7767767
    Abstract: A method of modifying polyethylene is disclosed. The method comprises contacting the polyethylene powder with ozone. The modified polyethylene exhibits an increase in melt elasticity and the complex viscosity at low shear rates. The rheological benefits are achieved without a significant reduction in the weight average molecular weight of the polyethylene. The modified polyethylene can be used in applications that require higher melt strength such as film or blow molding.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: August 3, 2010
    Assignee: Equistar Chemicals, LP
    Inventors: Andrew J. Scheie, Richard T. E. Sylvester
  • Polyolefin-metal laminate
    Publication number: 20100098958
    Abstract: A laminate and a process for making it are disclosed. The laminate comprises a metal substrate and a polymer layer that adheres to at least one plasma-treated surface of the metal substrate. The polymer layer comprises a blend of a first polyolefin and a grafted polyolefin. The laminate can be prepared by plasma-treating at least one surface of a metal substrate and extruding onto the plasma-treated surface a polymer layer comprising a blend of a first polyolefin and a grafted polyolefin.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Inventors: Thomas J. Schwab, Steven A. Schwartz, Maged G. Botros, Charles S. Holland, Robert S. Weber, Richard T.E. Sylvester, Neil W. Morris
  • Modification of polyethylene with ozone
    Publication number: 20090088534
    Abstract: A method of modifying polyethylene is disclosed. The method comprises contacting the polyethylene powder with ozone. The modified polyethylene exhibits an increase in melt elasticity and the complex viscosity at low shear rates. The rheological benefits are achieved without a significant reduction in the weight average molecular weight of the polyethylene. The modified polyethylene can be used in applications that require higher melt strength such as film or blow molding.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 2, 2009
    Inventors: Andrew J. Scheie, Richard T.E. Sylvester