Patents by Inventor R. G. Sharpe-Hill

R. G. Sharpe-Hill 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).

  • Conductive polymeric composite material with a resistance which is self-regulated by the temperature
    Patent number: 6790530
    Abstract: The present invention relates to a composite material comprising, by weight, the total being 100% : A) 40 to 90% of PVDF homopolymer or copolymer crystallized essentially in the &bgr; form, B) 10 to 60% of a conductive filler, C) 0 to 40% of a crystalline or semi-crystalline polymer, D) 0 to 40% of a filler other than C, such that the crystals in the &bgr; form are nucleated on the surface of the particles of the conductive filler. This material is conductive with a resistance which is self-regulated by the temperature. It shows an increase in the resistance as a function of the temperature (PTC or “Positive Temperature Coefficient” effect), so that the intensity stabilizes at an equilibrium temperature.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: September 14, 2004
    Assignee: ATOFINA
    Inventors: Alexander Korzhenko, Emmanuel Rastelletti, R. G. Sharpe-Hill
  • Conductive polymeric composite material with a resistance which is self-regulated by the temperature
    Publication number: 20040001954
    Abstract: The present invention relates to a composite material comprising, by weight, the total being 100% : A) 40 to 90% of PVDF homopolymer or copolymer crystallized essentially in the &bgr; form, B) 10 to 60% of a conductive filler, C) 0 to 40% of a crystalline or semi-crystalline polymer, D) 0 to 40% of a filler other than C, such that the crystals in the &bgr; form are nucleated on the surface of the particles of the conductive filler. This material is conductive with a resistance which is self-regulated by the temperature. It shows an increase in the resistance as a function of the temperature (PTC or “Positive Temperature Coefficient” effect), so that the intensity stabilizes at an equilibrium temperature.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 1, 2004
    Applicant: ATOFINA
    Inventors: Alexander Korzhenko, Emmanuel Rastelletti, R.G Sharpe-Hill
  • Conductive polymeric composite material with a resistance which is self-regulated by the temperature
    Publication number: 20020094441
    Abstract: The present invention relates to a composite material comprising, by weight, the total being 100% : A) 40 to 90% of PVDF homopolymer or copolymer crystallized essentially in the &bgr; form, B) 10 to 60% of a conductive filler, C) 0 to 40% of a crystalline or semi-crystalline polymer, D) 0 to 40% of a filler other than C, such that the crystals in the &bgr; form are nucleated on the surface of the particles of the conductive filler. This material is conductive with a resistance which is self-regulated by the temperature. It shows an increase in the resistance as a function of the temperature (PTC or “Positive Temperature Coefficient” effect), so that the intensity stabilizes at an equilibrium temperature.
    Type: Application
    Filed: November 8, 2001
    Publication date: July 18, 2002
    Applicant: ATOFINA
    Inventors: Alexander Korzhenko, Emmanuel Rastelletti, R.G. Sharpe-Hill