Patents by Inventor Koshi Katoh

Koshi Katoh 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).

  • Ferritic stainless steel having excellent machinability and local corrosion resistance
    Patent number: 4340424
    Abstract: Ferritic stainless steel having excellent machinability and local corrosion resistance comprises 21-30% chromium, less than 0.020% carbon, less than 0.050% nitrogen, 0.4-3.5% silicon, less than 3.0% manganese, 1.0-5.0% molybdenum, 0-3.0% vanadium, 0-5.0% nickel, and at least one element selected from the group consisting of 0.05-0.20% sulfur, 0.05-0.30% selenium, 0.05-0.30% tellurium, 0.01-0.20% lead, 0.01-0.20% bismuth and 0.005-0.065% calcium. When from 0.3-3.0% vandium is included the Si content should be 0.4-0.7%. When no vanadium is included the Si content should exceed 1% but not 3%.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: July 20, 1982
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Koshi Katoh, Takayoshi Shimizu
  • Molybdenum base alloy having excellent high-temperature strength and a method of producing same
    Patent number: 4165982
    Abstract: A molybdenum base alloy containing a given amount of at least one of zirconium and hafnium, a given amount of carbon and not more than given amounts of oxygen and nitrogen has an excellent high-temperature strength. This alloy is produced by an electron beam melting process under high vacuum.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: August 28, 1979
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Fujiwara Tatsuo, Koshi Katoh, Yuzo Ohtakara, Takayoshi Shimizu