Patents by Inventor Kofi Korsah

Kofi Korsah 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).

  • VACUUM FIELD EMISSION DEVICES AND METHODS OF MAKING SAME
    Publication number: 20130241389
    Abstract: A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed.
    Type: Application
    Filed: March 14, 2012
    Publication date: September 19, 2013
    Applicant: UT-BATTELLE, LLC
    Inventors: Roger A. KISNER, Kofi KORSAH, John T. SIMPSON, Alexander M. MELIN
  • Doped carbon nanostructure field emitter arrays for infrared imaging
    Patent number: 7608824
    Abstract: An infrared imaging device and method for making infrared detector(s) having at least one anode, at least one cathode with a substrate electrically connected to a plurality of doped carbon nanostructures; and bias circuitry for applying an electric field between the anode and the cathode such that when infrared photons are absorbed by the nanostructures the emitted field current is modulated. The detectors can be doped with cesium to lower the work function.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: October 27, 2009
    Assignee: UT-Battelle, LLC
    Inventors: Kofi Korsah, Larry R Baylor, John B Caughman, Roger A Kisner, Philip D Rack, Ilia N Ivanov
  • Doped Carbon Nanostructure Field Emitter Arrays for Infrared Imaging
    Publication number: 20090078872
    Abstract: An infrared imaging device and method for making infrared detector(s) having at least one anode, at least one cathode with a substrate electrically connected to a plurality of doped carbon nanostructures; and bias circuitry for applying an electric field between the anode and the cathode such that when infrared photons are absorbed by the nanostructures the emitted field current is modulated. The detectors can be doped with cesium to lower the work function.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 26, 2009
    Applicants: UT-BATTELLE, LLC, UNIVERSITY OF TENNESSEE RESEARCH FOUNDATION
    Inventors: Kofi Korsah, Larry R. Baylor, John B. Caughman, Roger A. Kisner, Philip D. Rack, Ilia N. Ivanov
  • Surface acoustic wave harmonic analysis
    Patent number: 6044332
    Abstract: A method for sensing and analyzing data with surface acoustic wave (SAW) devices comprises the steps of: propagating a sampling signal at a fundamental frequency through a SAW device coated for selective adsorption; measuring at least one parameter of at least one higher order harmonic of the fundamental frequency sampling signal; exposing the coated SAW device to enable the selective adsorption; measuring the at least one parameter of the at least one higher order harmonic of the fundamental frequency sampling signal after the exposing step; comparing the measurements of the at least one parameter of the at least one higher order harmonic before and after the exposing step; and, deriving a result of the selective adsorption based upon the comparing step. The at least one parameter is harmonic power and harmonic frequency. The at least one higher order harmonic is one or more odd harmonics.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: March 28, 2000
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Kofi Korsah, William B. Dress, Cheng Yu Ma, Michael R. Moore