Patents by Inventor Isao Funatsu

Isao Funatsu 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).

  • Publication number: 20050193862
    Abstract: A method for manufacturing sponge iron and an apparatus for charging in the method are disclosed. Iron oxide powder and reducing-agent powder are charged such that alternating layers of the iron oxide powder and the reducing-agent powder are formed and such that each of the layers is in the form of a helix, and then a reduction treatment is performed. The method has not only high reaction efficiency of a gas, high quality, and high productivity, but also the advantage for a production adjustment because the amount of charge can be adjusted without the limitation of a reduction time. The molar ratio of the carbon content in the reducing agent to the oxygen content in the iron oxide in the reaction container is preferably 1.1 or more.
    Type: Application
    Filed: January 29, 2004
    Publication date: September 8, 2005
    Applicant: JFE STEEL CORPORATION
    Inventors: Yoshitomo Suzuki, Akio Sonobe, Takashi Kuroki, Yasuhiko Sakaguchi, Hiroshi Itaya, Yotsuo Misumi, Isao Funatsu