Patents by Inventor Kazumasa Fukuda

Kazumasa Fukuda 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).

  • Method of recovery of ferromagnetic metal or alloy particles by using a magnetic drum
    Patent number: 4097313
    Abstract: Ferromagnetic metal or alloy particles are prepared by reducing ferromagnetic metal ions in the solution with a reducing agent to obtain a slurry of ferromagnetic metal or alloy particles and separating the particles by attracting the particles on a magnetic drum which is rotated under contacting with the slurry, and washing the particles and separating the particles from the magnetic drum.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: May 27, 1978
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Yasumichi Tokuoka, Kazumasa Fukuda, Akihiko Hosaka