Patents by Inventor Stéphan GRANDJEAN

Stéphan GRANDJEAN 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 for treatng a nitrided/nitrocarburised part
    Patent number: 10858720
    Abstract: In a method of treating a nitrided/nitrocarburized workpiece, at least a portion of the workpiece is subjected to a first step in which at least one laser beam is moved in at least one pass over the portion, until the surface layer of the portion is transformed in part or in full, and until the distribution of the nitrogen concentration in the diffusion zone is modified. In a second step at least one laser beam is moved in at least one pass over said portion so as to enable the nitrogen concentration in the underlying diffusion layer to be reduced.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: December 8, 2020
    Assignee: H.E.F.
    Inventors: Stéphan Grandjean, Fabrice Prost
  • METHOD FOR TREATNG A NITRIDED/NITROCARBURISED PART
    Publication number: 20170152582
    Abstract: In a method of treating a nitrided/nitrocarburized workpiece, at least a portion of the workpiece is subjected to a first step in which at least one laser beam is moved in at least one pass over the portion, until the surface layer of the portion is transformed in part or in full, and until the distribution of the nitrogen concentration in the diffusion zone is modified. In a second step at least one laser beam is moved in at least one pass over said portion so as to enable the nitrogen concentration in the underlying diffusion layer to be reduced.
    Type: Application
    Filed: July 16, 2015
    Publication date: June 1, 2017
    Applicant: H.E.F.
    Inventors: Stéphan GRANDJEAN, Fabrice PROST