Patents by Inventor Shuji Anamoto

Shuji Anamoto 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).

  • Ferrite magnet powder and magnet using the magnet powder, and method for preparing them
    Patent number: 6478982
    Abstract: The ferrite magnet powder of the present invention is magnet powder having, as the major phase, a La—Co magnetoplumbite ferrite where La and Co are substituted for Sr and Fe, respectively, represented by (1−x)SrO.(x/2)La2O3.(n−y/2)Fe2O3.yMO wherein x, y, and n represent mole ratios and satisfy 0.22−0.02≦x≦0.22+0.02, 0.18−0.02≦y≦0.18+0.02, and 5.2≦n≦6.0, where x>y.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: November 12, 2002
    Assignee: Sumitomo Special Metals Co. Ltd.
    Inventors: Shuji Anamoto, Isamu Furuchi
  • Ferrite magnet powder and magnet using said magnet powder, and method for preparing them
    Patent number: 6419847
    Abstract: An La—Co ferrite magnet powder, in which Sr and Fe are replaced with La and Co, respectively, is made by carrying out a calcination process at a temperature higher than 1300° C. and equal to or lower than 1450° C. Fe has a magnetic moment oriented upwardly with respect to a crystal c-axis at a number of sites thereof, and also has an opposite magnetic moment oriented downwardly with respect to the crystal c-axis at another number of sites thereof. And Fe is replaced with Co at the greater number of sites thereof. As a result, high coercivity is attained. In this manner, coercivity can be increased while suppressing decrease in saturation magnetization &sgr;s.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: July 16, 2002
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Sachio Toyota, Seiichi Hosokawa, Shuji Anamoto, Isamu Furuchi