Patents by Inventor Richard Keith Ahrenkiel

Richard Keith Ahrenkiel 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).

  • Transmission-modulated photoconductive decay measurement system
    Patent number: 8581613
    Abstract: A system and method for measuring recombination lifetime of a photoconductor or semiconductor material in real time and without physically contacting the material involving positioning the sample material between a transmitter and a receiver so that electromagnetic signals, preferably radio frequency signals, traveling from the transmitter to the receiver pass through the sample material. The electromagnetic signals are modulated as they pass through the sample material depending on the carrier density and conductivity of the sample material. The modulated electromagnetic signals received by the receiver are then analyzed to determine the carrier recombination lifetime of the sample material.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: November 12, 2013
    Assignee: Colorado School of Mines
    Inventors: Richard Keith Ahrenkiel, Donald John Dunlavy
  • TRANSMISSION-MODULATED PHOTOCONDUCTIVE DECAY MEASUREMENT SYSTEM
    Publication number: 20100283496
    Abstract: A system and method for measuring recombination lifetime of a photoconductor or semiconductor material in real time and without physically contacting the material involving positioning the sample material between a transmitter and a receiver so that electromagnetic signals, preferably radio frequency signals, traveling from the transmitter to the receiver pass through the sample material. The electromagnetic signals are modulated as they pass through the sample material depending on the carrier density and conductivity of the sample material. The modulated electromagnetic signals received by the receiver are then analyzed to determine the carrier recombination lifetime of the sample material.
    Type: Application
    Filed: January 27, 2010
    Publication date: November 11, 2010
    Applicant: Colorado School of Mines
    Inventors: Richard Keith Ahrenkiel, Donald John Dunlavy