Patents by Inventor Martine Lauvergne

Martine Lauvergne 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).

  • Process for pickling a piece of steel and in particular a sheet strip of stainless steel
    Patent number: 5851304
    Abstract: The process comprises applying an aqueous pickling solution containing hydrochloric acid and ferric and ferrous pickling irons in solution, and, for the purpose of maintaining a constant pickling power of the aqueous solution of hydrochloric acid having a pH lower than 1, maintaining the concentration of Fe.sup.3+ ions at a value between 1 g/litre and 300 g/litre, by reoxidation by means of an oxygenation of the Fe.sup.2+ ions produced during the pickling, the REDOX potential being maintained at a value between 0 and 800 mV, the potential being measured between a platinum electrode and a reference AG/AGCl electrode which are placed in the solution.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: December 22, 1998
    Assignee: Usinor Sacilor
    Inventors: Henri Giraud, Bernard Vialatte, Martine Lauvergne