Patents by Inventor Nina FONSTEIN

Nina FONSTEIN 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).

  • Martensitic steel with delayed fracture resistance and manufacturing method
    Patent number: 10196705
    Abstract: A cold rolled and annealed martensitic steel sheet is provided. The steel sheet includes by weight percent, 0.30?C?0.5%, 0.2?Mn?1.5%, 0.5?Si?3.0%, 0.02?Ti?0.05%, 0.001?N?0.008%, 0.0010?B?0.0030%, 0.01?Nb?0.1%, 0.2?Cr?2.0%, P?0.02%, S?0.005%, Al?1%, Mo?1% and Ni?0.5%. The remainder of the composition includes iron and unavoidable impurities resulting from melting. The microstructure is 100% martensitic and a prior austenite grain size is lower than 20 ?m. The steel sheet has a delayed fracture resistance of at least 24 hours during an acid immersion U-bend test. A method, part, structural member and vehicle are also provided.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: February 5, 2019
    Assignee: ArcelorMittal
    Inventors: Rongjie Song, Narayan Pottore, Nina Fonstein
  • MARTENSITIC STEEL WITH DELAYED FRACTURE RESISTANCE AND MANUFACTURING METHOD
    Publication number: 20160304981
    Abstract: A cold rolled and annealed martensitic steel sheet is provided. The steel sheet includes by weight percent, 0.30?C?0.5%, 0.2?Mn?1.5%, 0.5?Si?3.0%, 0.02?Ti?0.05%, 0.001?N?0.008%, 0.0010?B?0.0030%, 0.01?Nb?0.1%, 0.2?Cr?2.0%, P?0.02%, S?0.005%, Al?1%, Mo?1% and Ni?0.5%. The remainder of the composition includes iron and unavoidable impurities resulting from melting. The microstructure is 100% martensitic and a prior austenite grain size is lower than 20 ?m. The steel sheet has a delayed fracture resistance of at least 24 hours during an acid immersion U-bend test. A method, part, structural member and vehicle are also provided.
    Type: Application
    Filed: December 11, 2013
    Publication date: October 20, 2016
    Inventors: Rongjie SONG, Narayan POTTORE, Nina FONSTEIN