Patents by Inventor Tor Hartvig

Tor Hartvig 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 wear resistant steel
    Patent number: 4394168
    Abstract: Austenitic steel having 16-25% Mn, 1,1-2,0% C, 0,2-2,0% Si, 0,5-5% Cr, 0,1-0,5% Ti, 0,3-4,0% Mo with or without addition of up to 0,5% of one or more of Ce, Sn and carbide forming elements like V, W, Nb (Cb), max. 5% Ni and max. 5% Cu, the remainder being Fe and impurities to max. 0,1% P and 0,1% S.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: July 19, 1983
    Assignee: A/S Raufoss Ammunisjonsfabrikker
    Inventors: Tor Hartvig, Petter Fjellheim
  • Austenitic wear-resistant steel
    Patent number: 4130418
    Abstract: Austenitic steel having 16-23% Mn, 1.1-1.5% C, 0-4% Cr, 0.1-0.5% Ti, the remainder being Fe and impurities.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: December 19, 1978
    Assignee: Raufoss Ammunisjonsfabrikker A/S
    Inventor: Tor Hartvig