Patents by Inventor Masao Izumiyama

Masao Izumiyama 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).

  • Stainless cast alloy steel for use at low temperatures
    Patent number: 4127428
    Abstract: A stainless cast alloy steel suitable for ground joint portions, airtight portions, sliding portions, etc., used at low temperatures comprising: from about 0.03 to about 0.15% by weight of C; up to about 2% by weight of Si; up to about 2% by weight of Mn; from about 18 to about 26% by weight of Cr; from about 5 to about 13% by weight of Ni, the remainder being Fe and unavoidable trace impurities; wherein a ferrite phase is present in an amount of from about 10 to about 40% by volume, based on the volume of the stainless cast alloy steel.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: November 28, 1978
    Assignee: Japan Gasoline Co., Ltd.
    Inventors: Masao Izumiyama, Naohiko Kagawa, Kenji Satoh
  • Welding process for aluminum or chrome diffusion-coated steel
    Patent number: 3958743
    Abstract: In conducting the butt welding of a coated steel produced by applying a diffusion coating with aluminum or chromium on the surface of a chromium-molybdenum steel as the base metal, adoption of a process comprising welding the diffusion-coating side of said coated steel with a ferritic high chrome steel to begin with, next welding it with a molybdenum steel or chromium-molybdenum steel selected on the bases of the content of chromium and the content of molybdenum in the base metal, and lastly welding it with the same material as the base metal, varieties of such drawbacks as would ordinarily arise from the weld zone can be avoided.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: May 25, 1976
    Assignee: Japan Gasoline Co., Ltd.
    Inventors: Kunio Ishii, Masao Izumiyama, Keikichi Maeda