Patents by Inventor Fumikazu Kawaguchi

Fumikazu Kawaguchi 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).

  • Iron ore pellets containing magnesium oxide
    Patent number: 4356027
    Abstract: Iron ore pellets having superior reduction and load softening properties in blast furnace operations. The pellets are prepared from a raw material to which is added an amount of magnesia or a MgO feeding source such as that the ratio of MgO to the SiO.sub.2 content of the raw material is at least about 0.5 and the CaO content in the raw material is adjusted so that the ratio CaO/SiO.sub.2 is less than about 0.05.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: October 26, 1982
    Assignee: Kobe Steel, Limited
    Inventors: Takeshi Sugiyama, Shoji Shirouchi, Mamoru Onoda, Fumikazu Kawaguchi, Isao Fujita
  • Fired iron-ore pellets having macro pores and process for producing the same
    Patent number: 4257806
    Abstract: Fired iron-ore pellets are disclosed which are prepared by crushing iron ore to be pelletized, mixing a carbonaceous material of grain sizes ranging from 0.1 to 3 mm in diameter to the crushed iron ore in an amount of up to 4% by weight, pelletizing the mixture thus prepared, and firing the resulting pellets; thereby providing pellets throughout each of which is dispersed macro-pores of sizes ranging from 0.1 to 3 mm in diameter at a ratio of up to 25% relative to all pores contained in each pellet.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: March 24, 1981
    Assignee: Kobe Steel, Limited
    Inventors: Isao Fujita, Mamoru Onoda, Fumikazu Kawaguchi, Yoshimichi Takenaka, Tadao Tsutaya
  • Fired iron-ore pellets having macro pores
    Patent number: 4231797
    Abstract: Fired iron-ore pellets are disclosed which are prepared by crushing iron ore to be pelletized, mixing a carbonaceous material of grain sizes ranging from 0.1 to 3 mm in diameter to the crushed iron ore in an amount of up to 4% by weight, pelletizing the mixture thus prepared, and firing the resulting pellets; thereby providing pellets throughout each of which is dispersed macro-pores of sizes ranging from 0.1 to 3 mm in diameter at a ratio of up to 25% relative to all pores contained in each pellet.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: November 4, 1980
    Assignee: Kobe Steel, Limited
    Inventors: Isao Fujita, Mamoru Onoda, Fumikazu Kawaguchi, Yoshimichi Takenake, Tadao Tsutaya