Patents by Inventor Shuzo Itoh

Shuzo Itoh 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).

  • Patent number: 4957545
    Abstract: Described herein is a smelting reduction process for smelting and reducing an iron oxide material by introducing same into a smelting reduction furnace together with a solid carbonaceous material, a fluxing agent and an oxygen-containing gas, process comprising: subjecting part or all of the solid carbonaceous material to primary combustion using an oxygen-containing gas with an oxygen content corresponding to a theoretical air ratio of 0.4 to 0.9: separating the resulting reducing gas from combustion residue of the solid carbonaceous material; and introducing the reducing gas into a smelting reduction furnace to effect secondary combustion with supply of a separately introduced oxygen-containing gas for smelting and reducing said iron material.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: September 18, 1990
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Akihide Hikosaka, Tsuyoshi Mimura, Tomio Suzuki, Takeo Yoshigae, Shuzo Itoh