Patents by Inventor Michel Contre

Michel Contre 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).

  • Boron carbide La, Sr and/or Ba hexaboride ceramic material for a low temperature direct heating electric gun cathode
    Patent number: 4265666
    Abstract: Ceramic material for a low temperature direct heating electron gun cathode, wherein it is constituted by a mixed ceramic material of a hexaboride of a refractory material consisting of at least one substance with a high emissive power from the group consisting of La, Sr, and Ba hexaborides and a conductive material, boron carbide, having a resistivity higher than that of an emissive substance, the structure of the ceramic material resulting from its production by cofritting of the said components.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: May 5, 1981
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Michel Contre, Philippe Martin, Monique Quetier