Patents by Inventor Stephen L. Cluff

Stephen L. Cluff 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).

  • Bituminous mixtures comprising thermoplastic polymer membranes
    Patent number: 7838575
    Abstract: High performance bituminous mixtures that are useful for the road paving and roofing industries comprise mineral aggregates coated with a thermoplastic polymer composition. Because of their high performance properties, the absence of any aggressive and toxic adhesion promoters and the possibility of using recovered or recycled thermoplastic polymers to form the coating or “membrane,” the bituminous mixtures described herein provide an excellent environmentally friendly solution for pavement construction and roofing industries.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: November 23, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jiri Lang, Stephen L. Cluff
  • BITUMINOUS MIXTURES COMPRISING THERMOPLASTIC POLYMER MEMBRANES
    Publication number: 20090163625
    Abstract: High performance bituminous mixtures that are useful for the road paving and roofing industries comprise mineral aggregates coated with a thermoplastic polymer composition. Because of their high performance properties, the absence of any aggressive and toxic adhesion promoters and the possibility of using recovered or recycled thermoplastic polymers to form the coating or “membrane,” the bituminous mixtures described herein provide an excellent environmentally friendly solution for pavement construction and roofing industries.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Inventors: JIRI LANG, Stephen L. Cluff
  • Flexible coating compositions
    Patent number: 4665128
    Abstract: Blends of acrylic copolymer and polyester urethane provide resin suitable for use as enamel coatings which, when cured, exhibit both hardness and flexibility.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: May 12, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stephen L. Cluff, Clifford H. Strolle
  • Internally crosslinkable acrylic polymers and diglycidyl esters of dibasic acids
    Patent number: 4548963
    Abstract: Acrylic polymers prepared from hydroxy alkyl esters of acrylic or methacrylic acid, glycidic monomer and ethylenically unsaturated monomer, as well as enamels based on mixtures of such polymers and diglycidyl esters of dibasic acids.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: October 22, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stephen L. Cluff, Clifford H. Strolle, Robert D. Breazeale
  • Oxazoline polyester oligomers
    Patent number: 4504620
    Abstract: Polyesters with oxazoline units, especially useful as additives to promote adhesion in crosslinked enamels.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: March 12, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stephen L. Cluff, Clifford H. Strolle