Patents by Inventor Jean Dhers

Jean Dhers 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 annealing iron-based products comprised of carbon steel rich in chromium and manganese
    Patent number: 5536338
    Abstract: A method of annealing of siderurgical products comprised of carbon steel having a chromium content in the range 0.15-1.5 wt. % and a manganese content also in the range 0.15-1.5 wt. %, whereby said products are held in an annealing furnace under nitrogen atmosphere to bring about globulization of the perlite; characterized in that oxygen is added to this atmosphere, in an amount greater than or equal to 0.5 vol. %.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: July 16, 1996
    Assignee: ASCOMETAL (Societe Anonyme)
    Inventors: Jean Metivier, Helene Chaudanson, Jean Dhers