Patents by Inventor Robert John Prance

Robert John Prance 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).

  • Apparatus and method for measuring charge density distribution
    Patent number: 8798947
    Abstract: The invention provides a method and apparatus for the detection of charge density distribution at the surface of a material sample. The apparatus comprises an electric potential sensor for measuring surface charge on a material sample, wherein the electrical potential sensor includes a probe for capacitively coupling the electric potential sensor to the surface of the material sample, an amplifier for generating a measurement output, the probe being connected to an input of the amplifier and the measurement output being supplied at an output of the amplifier, and a feedback arrangement driven from the output of the amplifier for enhancing the input impedance of the amplifier.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: August 5, 2014
    Assignee: The University of Sussex-Falmer
    Inventors: Helen Prance, Robert John Prance, Philip Watson, Sam Thomas Beardsmore-Rust
  • APPARATUS AND METHOD FOR MEASURING CHARGE DENSITY DISTRIBUTION
    Publication number: 20120323513
    Abstract: The invention provides a method and apparatus for the detection of charge density distribution at the surface of a material sample. The apparatus comprises an electric potential sensor for measuring surface charge on a material sample, wherein the electrical potential sensor includes a probe for capacitively coupling the electric potential sensor to the surface of the material sample, an amplifier for generating a measurement output, the probe being connected to an input of the amplifier and the measurement output being supplied at an output of the amplifier, and a feedback arrangement driven from the output of the amplifier for enhancing the input impedance of the amplifier.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 20, 2012
    Applicant: The University of Sussex
    Inventors: Helen Prance, Robert John Prance, Philip Watson