Patents by Inventor Francois H. J. Thevenot

Francois H. J. Thevenot 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).

  • Patent number: 4404045
    Abstract: The invention relates to a process and apparatus for boronizing pieces made of metal or cermet and to surface-boronized pieces. The pieces are placed in a chamber at between 850.degree. and 1,150.degree. C. and they are subjected, in the presence of boron carbide, to a gaseous stream of trifluoroboroxole (BOF).sub.3. The boron carbide is advantageously pulverulent and out of contact with the pieces to be boronized.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: September 13, 1983
    Assignee: Association pour la Recherche et le Development des Methodes et Processus Industriels (Armines)
    Inventors: Francois H. J. Thevenot, Patrice M. V. Goeuriot, Julian H. Driver, Jean-Paul R. Lebrun
  • Patent number: 4348980
    Abstract: The invention relates to a process and apparatus for boronizing pieces made of metal or cermet and to surface-boronized pieces. The pieces are placed in a chamber at between 850.degree. and 1,150.degree. C. and they are subjected, in the presence of boron carbide, to a gaseous stream of trifluoroboroxole (BOF).sub.3. The boron carbide is advantageously pulverulent and out of contact with the pieces to be boronized.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: September 14, 1982
    Assignee: Association pour la Recherche et le Development des Methodes et Processus Industriels (Armines)
    Inventors: Francois H. J. Thevenot, Patrice M. V. Goeuriot, Julian H. Driver, Jean-Paul R. Lebrun
  • Patent number: 4289545
    Abstract: The invention relates to a process and apparatus for boronizing pieces made of metal or cermet and to surface-boronized pieces. The pieces are placed in a chamber at between 850.degree. and 1,150.degree. C. and they are subjected, in the presence of boron carbide, to a gaseous stream of trifluoroboroxole (BOF).sub.3. The boron carbide is advantageously pulverulent and out of contact with the pieces to be boronized.
    Type: Grant
    Filed: February 21, 1980
    Date of Patent: September 15, 1981
    Assignee: Association pour la Recherche et le Developpement des Methodes et Processus Industriels (ARMINES)
    Inventors: Francois H. J. Thevenot, Patrice M. V. Goeuriot, Julian H. Driver, Jean-Paul R. Lebrun