Patents by Inventor Takero Ito

Takero Ito 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).

  • High purity iron oxide and method for production hereof
    Patent number: 5316746
    Abstract: A method for producing high-purity iron oxide which comprises pulverizing iron ore into powder having an average particle diameter of 20-150 .mu.m, removing fine particles from the powder, and subjecting the powder to wet magnetic separation in a magnetic field of 1000-15000 gauss for the removal of impurities. The iron oxide powder may undergo the secondary steps of pulverization and classification, which are performed by the combination of a wet grinding means and a wet cyclone, and drying and calcination.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: May 31, 1994
    Assignees: Kawasaki Steel Corporation, Kawatetsu Mining Co., Ltd.
    Inventors: Yuuki Narita, Takero Ito, Shuetsu Ogasawara