Patents by Inventor Jean de Cachard

Jean de Cachard 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).

  • Thermionic cathode for electron tubes and method for the manufacture thereof
    Patent number: 5828165
    Abstract: Disclosed is a thermionic cathode for electron tubes comprising a material that has a substrate, a compound of an element forming an emitting monolayer, chosen from among the rare earth zirconates, rare earth hafnates, rare earth aluminates and rare earth berylates, and a reducing agent which, at the working temperature of the cathode, reacts with the compound releasing the element that forms the monolayer. Application in particular to electron grid tubes. FIG. 1.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: October 27, 1998
    Assignee: Thomson-CSF
    Inventors: Guy Clerc, Jean de Cachard