Patents by Inventor Jean-Michel JACHMICH

Jean-Michel JACHMICH 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).

  • STEEL FOR LEAF SPRINGS OF AUTOMOBILES AND A METHOD OF MANUFACTURING OF A LEAF THEREOF
    Publication number: 20230340631
    Abstract: A steel for leaf spring including of the following elements 0.4% ? C ? 0.7 %; 0.5% ? Mn ?1.5 %;1% ? Si ? 2.5 %; 0.001% ? Al ? 0.1%; 0.1% ? Ni ? 1%;0.2% ? Cr ? 1.5 %; 0 ? P ? 0.09%; 0 ? S ? 0.09%; 0% ? N ? 0.09%; 0% ? Mo ? 0.5%; 0% ? V ? 0.2%; 0% ? Nb ? 0.1%; 0% ? Ti ? 0.1%; 0% ? Cu ? 1%; 0% ? B ? 0.008%; 0% ? Sn ? 0.1%; 0% ? Ce ? 0.1%; 0% ? Mg ? 0.10%; 0% ? Zr ? 0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel including, by area percentage, 75% to 98% of Martensite, 2% to 20% of Residual Austenite, with a cumulative optional presence of bainite and ferrite between 0% to 5%.
    Type: Application
    Filed: September 23, 2020
    Publication date: October 26, 2023
    Inventors: Jean-Michel JACHMICH, Bertrand MICHAUT, Laurent LORICH