Patents by Inventor Lap-Tap Andrew Cheng

Lap-Tap Andrew Cheng 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).

  • Process for improving the emission of electron field emitters
    Patent number: 8529798
    Abstract: This invention provides a process for improving the field emission of an electron field emitter comprised of an acicular emitting substance such as acicular carbon, an acicular semiconductor, an acicular metal or a mixture thereof, comprising applying a force to the surface of the electron field emitter wherein the force results in the removal of a portion of the electron field emitter thereby forming a new surface of the electron field emitter.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: September 10, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Robert Joseph Bouchard, Lap-Tap Andrew Cheng, David Herbert Roach, John Gerard Lavin
  • PROCESS FOR IMPROVING THE EMISSION OF ELECTRON FIELD EMITTERS
    Publication number: 20090104834
    Abstract: This invention provides a process for improving the field emission of an electron field emitter comprised of an acicular emitting substance such as acicular carbon, an acicular semiconductor, an acicular metal or a mixture thereof, comprising applying a force to the surface of the electron field emitter wherein the force results in the removal of a portion of the electron field emitter thereby forming a new surface of the electron field emitter.
    Type: Application
    Filed: October 27, 2008
    Publication date: April 23, 2009
    Inventors: Robert Joseph Bouchard, Lap-Tap Andrew Cheng, John Gerard Lavin, David Herbert Roach
  • PROCESS FOR IMPROVING THE EMISSION OF ELECTRON FIELD EMITTERS
    Publication number: 20080299864
    Abstract: This invention provides a process for improving the field emission of an electron field emitter comprised of an acicular emitting substance such as acicular carbon, an acicular semiconductor, an acicular metal or a mixture thereof, comprising applying a force to the surface of the electron field emitter wherein the force results in the removal of a portion of the electron field emitter thereby forming a new surface of the electron field emitter.
    Type: Application
    Filed: July 16, 2008
    Publication date: December 4, 2008
    Inventors: Robert Joseph Bouchard, Lap-Tap Andrew Cheng, John Gerard Lavin, David Herbert Roach