Patents by Inventor Jacques Pelchat

Jacques Pelchat 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).

  • Method of manufacturing a zirconium-based alloy tube for a nuclear fuel element sheath and tube thereof
    Patent number: 4938921
    Abstract: The present invention relates to a method of manufacturing tubes for a nuclear fuel element sheath, comprising a plurality of successive cold rolling and annealing steps including a final .beta. phase heat treatment consisting of maintaining said tube at a temperature between 950.degree. C. and 1250.degree. C. for a time duration sufficient for obtaining a homogeneous .beta. phase within and throughout the whole thickness of said tube, and rapidly cooling said tube to ambient temperature for retaining said .beta. phase throughout the whole thickness of said tube during subsequent cold processing steps including final cleaning of the tube.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: July 3, 1990
    Assignees: Framatome, S.N.C. Uranium Pechiney et Framatome
    Inventors: Jean-Paul Mardon, Jacques Decours, Michel Weisz, Jacques Pelchat, Jean Le Pape
  • Zirconium alloys
    Patent number: 3963534
    Abstract: In a method of fabrication of nuclear reactor components such as fuel cans and pressure tubes, use is made of zirconium alloys such as Zircaloy 2 or Zircaloy 4 having an oxygen content of 0.14 to 0.25 % by weight. The components are subjected to an annealing operation at a temperature within the range of 400.degree. to 750.degree.C and especially 525.degree. to 750.degree.C over a period of approximately two hours, thus resulting in recrystallization.
    Type: Grant
    Filed: February 28, 1974
    Date of Patent: June 15, 1976
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Mathieu Frenkel, Jacques Pelchat, Michel Weisz