Patents by Inventor Tohru Muta

Tohru Muta 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).

  • Pitting corrosion resistant austenite stainless steel
    Patent number: RE29313
    Abstract: A pitting corrosion resistant austenite stainless steel comprising not more than 0.08% by weight of carbon, not more than 4% by weight of silicon, not more than 5.0% by weight of manganese, not more than 0.04% by weight of phosphorus, not more than 0.03% by weight of sulfur, 10 to 18% by weight of nickel, 23 to 30% by weight of chromium and 0.30 to 0.45% by weight of nitrogen, the balance being iron and unavoidable impurities, and satisfying the condition of Ni % + 30 (C % + N %) .gtoreq. 20%.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: July 19, 1977
    Assignee: Nippon Steel Corporation
    Inventors: Tohru Muta, Hideo Abo, Sakae Noguchi