Patents by Inventor Yves Jean Respen

Yves Jean Respen 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).

  • Producing rolled steel products
    Patent number: 4016009
    Abstract: In the rolling mill the temperature of the product is reduced to between Ac.sub.3 and Ac.sub.3 + 150.degree. C before it enters the finishing stands. The product emerging from the finishing stands is quenched to provide a surface layer of martensite and/or bainite. Subsequently the heat of the core of the product is allowed to raise the temperature of the surface layer to between 450.degree. and 750.degree. C, so that the quenched layer is tempered.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: April 5, 1977
    Assignee: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
    Inventors: Mario Economopoulos, Yves Jean Respen
  • Rolled steel rod or bar
    Patent number: 4016015
    Abstract: Steel rod or bar at the exit of the finishing stand of a hot rolling mill is superficially quenched, so that the surface layer of the rod or bar is given a bainitic or martensitic structure. Immediately after quenching, the core of the rod or bar is at about 850.degree. C and, therefore, still austenitic. Subsequent air cooling allows the austenite to transform to ferrite and carbides, while the surface layer is tempered by the heat transferred to it from the core.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: April 5, 1977
    Assignee: Centre de Recherches Metallurgiques-Centrium voor Research in de Metallurgie
    Inventors: Yves Jean Respen, Paul Andre Cosse, Mario Economopoulos