Patents by Inventor Jean Montgaillard

Jean Montgaillard 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 having an embedded grid, process for its fabrication, and high frequency electron tubes using such a cathode
    Patent number: 4302702
    Abstract: The invention relates to metal oxide activated porous tungsten cathodes and methods of their manufacture. A cathode 1 of porous tungsten activated by metal oxides is mounted on a housing 2 which has a heating filament 3. On the outer face of the cathode there is a pattern or grid of pure tungsten (preferably formed by a chemical vapor deposition of WCl.sub.6 or WF.sub.6) of crystalline material the outer face of which has an orientation in the (100) or (110) plane and is parallel to the surface of the cathode. The invention will find particular use in the cathode guns of high frequency tubes such as traveling wave tubes and klystrons.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: November 24, 1981
    Assignee: Thomson-CSF
    Inventors: Jean Montgaillard, Arvind Shroff