Patents by Inventor Kazuyuki Nakaue

Kazuyuki Nakaue 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 powders for bonded magnet, process for the production of the powders, and bonded magnet made by using the same
    Patent number: 8337714
    Abstract: The present invention provides ferrite powders for bonded magnet capable of suppressing increase of SFD, while widening a particle size distribution for obtaining flowability and compressed density, and also capable of suppressing deterioration of orientation and magnetizability, and provides a process for a production magnetoplumbite-type ferrite powders containing an oxide of at least one or more kinds of transition metals selected from a group consisting of Zr, Ti, Zn, Co, Mn, and Ni, having a mean particle size of 0.20 ?m or more and less than 5.00 ?m, being the ferrite powders for bonded magnet with the ratio of particles having particle size of 1 ?m or less being 20 mass % or more in the magnetoplumbite-type ferrite powder size distribution obtained by a laser diffraction type particle size distribution analyzer.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 25, 2012
    Assignees: Dowa Electronics Materials Co., Ltd., Dowa F-Tec Co., Ltd.
    Inventors: Kazuyuki Nakaue, Shinichi Suenaga, Masahiro Kojima, Hiroya Ikeda, Satoru Tsuboi
  • FERRITE POWDERS FOR BONDED MAGNET, PROCESS FOR THE PRODUCTION OF THE POWDERS, AND BONDED MAGNET MADE BY USING THE SAME
    Publication number: 20100295643
    Abstract: The present invention provides ferrite powders for bonded magnet capable of suppressing increase of SFD, while widening a particle size distribution for obtaining flowability and compressed density, and also capable of suppressing deterioration of orientation and magnetizability, and provides a process for a production magnetoplumbite-type ferrite powders containing an oxide of at least one or more kinds of transition metals selected from a group consisting of Zr, Ti, Zn, Co, Mn, and Ni, having a mean particle size of 0.20 ?m or more and less than 5.00 ?m, being the ferrite powders for bonded magnet with the ratio of particles having particle size of 1 ?m or less being 20 mass % or more in the magnetoplumbite-type ferrite powder size distribution obtained by a laser diffraction type particle size distribution analyzer.
    Type: Application
    Filed: September 26, 2008
    Publication date: November 25, 2010
    Applicants: DOWA ELECTRONICS MATERIALS CO., LTD, DOWA F-TEC CO., LTD
    Inventors: Kazuyuki Nakaue, Shinichi Suenaga, Masahiro Kojima, Hiroya Ikeda, Satoru Tsuboi