Patents by Inventor Jan Ingemar Fridberg

Jan Ingemar Fridberg 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).

  • Austenitic stainless steel with high molybdenum content
    Patent number: 4078920
    Abstract: An austenitic stainless steel alloy having a high molybdenum content consisting essentially of up to 0.08% carbon, 0.01-0.8% silicon, 0.2-2.0% manganese, 17-25% chromium, 15-21% nickel, 6-10% molybdenum, 0.06-0.25% nitrogen and 0-2.0% copper and the balance of the contents of said alloy being iron with residual impurities. The alloys of the present invention have improved corrosion resistance and improved hot and cold ductility.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: March 14, 1978
    Assignee: Avesta Jernverks Aktiebolag
    Inventors: Mats Liljas, Jan Ingemar Fridberg, Hasse Sigverd Fredriksson