Patents by Inventor Renyu Cao

Renyu Cao 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).

  • Carbon-containing cathodes for enhanced electron emission
    Patent number: 6091186
    Abstract: A cathode has electropositive atoms directly bonded to a carbon-containing substrate. Preferably, the substrate comprises diamond or diamond-like (sp.sup.3) carbon, and the electropositive atoms are Cs. The cathode displays superior efficiency and durability. In one embodiment, the cathode has a negative electron affinity (NEA). The cathode can be used for field emission, thermionic emission, or photoemission. Upon exposure to air or oxygen, the cathode performance can be restored by annealing or other methods. Applications include detectors, electron multipliers, sensors, imaging systems, and displays, particularly flat panel displays.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: July 18, 2000
    Assignees: The Board of Trustees of the Leland Stanford Junior University, Sandia National Laboratories
    Inventors: Renyu Cao, Lawrence Pan, German Vergara, Ciaran Fox