Patents by Inventor Pascale Haudrechy

Pascale Haudrechy 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).

  • Corrosion-resistant low-nickel austenitic stainless steel
    Patent number: 6274084
    Abstract: Corrosion-resistant low-nickel austenitic stainless steel having the following compostion in percentages by weight: 0.01%<carbon<0.08%, 0.1%<silicon<1%, 5%<manganese<11%, 15%<chromium<17.5%, 1%<nickel<4%, 1%<copper<4%, 1×10−4%<sulfur<20×10−4%, 1×10−4%<calcium<50×10−4%, 0%<aluminum<0.03%, 0.005%<phosphorus<0.1%, boron<5×10−4%, oxygen<0.01%, the balance being iron and impurities resulting from the smelting operation.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: August 14, 2001
    Assignees: Ugine SA, Ugine-Savoie Imphy
    Inventor: Pascale Haudrechy
  • Process for producing a ferritic stainless steel having an improved corrosion resistance, especially resistance to intergranular and pitting corrosion
    Patent number: 5779820
    Abstract: The present invention relates to a process for producing a ferritic stainless steel having an improved corrosion resistance, and especially resistance to intergranular corrosion and to pitting corrosion. The steel is subjected, in a first phase, to cooling at a rate of between 400.degree. C. and 600.degree. C./hour down to a temperature of 900.degree. C. and then, in a second phase, to rapid cooling at a rate of between 1200.degree. C. and 1400.degree. C./h.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: July 14, 1998
    Assignee: Usinor Sacilor
    Inventors: Jean-Michel Hauser, Pascale Haudrechy