Patents by Inventor Kiyoto Kanazawa

Kiyoto Kanazawa 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).

  • Magnetic recording medium
    Patent number: 4600650
    Abstract: A magnetic recording medium is composed of a substrate coated with a magnetic layer comprising a magnetic powder and a binder, wherein the binder comprises from 20 to 60% by weight of a polyurethane resin, from 20 to 60% by weight of an epoxy resin, from 15 to 55% by weight of a vinyl chloride-vinyl acetate copolymer resin and a polyisocyanate.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: July 15, 1986
    Assignee: TDK Corporation
    Inventors: Akihiko Hosaka, Kiyotaka Okuyama, Kiyoto Kanazawa
  • Magnetic recording medium
    Patent number: 4460651
    Abstract: A magnetic recording medium comprises a magnetic layer coated on a substrate and composed of ferromagnetic metal or alloy powder dispersed in a binder, wherein the magnetic layer contains Al.sub.2 O.sub.3 having an average particle size of at most 1 .mu.m and an .alpha.-form rate of from 60 to 90%.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: July 17, 1984
    Assignee: TDK Corporation
    Inventors: Akihiko Hosaka, Kiyotaka Okuyama, Kiyoto Kanazawa
  • Process for producing a magnetic recording medium
    Patent number: 4459319
    Abstract: A process for producing a magnetic recording medium, which comprises dispersing a ferromagnetic powder in a binder to form a magnetic coating composition and applying the magnetic coating composition onto a film base support to form a magnetic layer thereon, wherein corona discharge treatment is applied after the application and drying the magnetic coating composition on the film base support.
    Type: Grant
    Filed: July 13, 1983
    Date of Patent: July 10, 1984
    Assignee: TDK Corporation
    Inventors: Akihiko Hosaka, Kiyotaka Okuyama, Kiyoto Kanazawa