Patents by Inventor Eishi KUSAKA

Eishi KUSAKA 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).

  • Production method for low-sulfur iron ore
    Patent number: 10596578
    Abstract: A process for producing an iron ore having a sulfur content reduced to 0.08% or less, which includes a step of subjecting an iron ore containing sulfur in an amount of more than 0.08% and 2% or less to a flotation. The flotation satisfies any one of the following (1) to (3): (1) a xanthate-based compound and a salt of an amine compound are used as collectors, (2) a xanthate-based compound is used as a collector and a substance which releases a sulfur ion in water is used as an activator, or (3) a xanthate-based compound and a salt of an amine compound are used as collectors and a substance which releases a sulfur ion in water is used as an activator.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: March 24, 2020
    Assignee: KOBE STEEL, LTD.
    Inventors: Eishi Kusaka, Katsuyuki Iijima, Takayasu Fujiura
  • PRODUCTION METHOD FOR LOW-SULFUR IRON ORE
    Publication number: 20160107170
    Abstract: A process for producing an iron ore having a sulfur content reduced to 0.08% or less, which includes a step of subjecting an iron ore containing sulfur in an amount of more than 0.08% and 2% or less to a flotation. The flotation satisfies any one of the following (1) to (3): (1) a xanthate-based compound and a salt of an amine compound are used as collectors, (2) a xanthate-based compound is used as a collector and a substance which releases a sulfur ion in water is used as an activator, or (3) a xanthate-based compound and a salt of an amine compound are used as collectors and a substance which releases a sulfur ion in water is used as an activator.
    Type: Application
    Filed: June 23, 2014
    Publication date: April 21, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Eishi KUSAKA, Katsuyuki IIJIMA, Takayasu FUJIURA