Patents by Inventor Isamu Yamauchi

Isamu Yamauchi 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).

  • Structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures
    Patent number: 4675156
    Abstract: Disclosed is a structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures. The steel has a composition essentially consisting of, by weight, not greater than 0.05% of carbon, 0.20 to 0.70% of nitrogen, not greater than 1.0% of silicon, not greater than 25% of manganese, 13 to 35% of chromium, 5 to 25% of nickel and the balance substantially iron. The chromium content and manganese content is selected to meet the condition of (Cr+0.9 Mn).gtoreq.20%. The index of cleanliness showing the amount of nonmetallic inclusions is not greater than 0.1%.
    Type: Grant
    Filed: August 15, 1985
    Date of Patent: June 23, 1987
    Assignees: Nippon Steel Corporation, Japan Atomic Energy Research Institute
    Inventors: Setsu Sakamoto, Yasuhiro Nakagawa, Isamu Yamauchi, Takashi Zaizen, Katsumi Suzuki, Susumu Shimamoto, Hideo Nakajima