Patents by Inventor Fumio Kudo

Fumio Kudo 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 for making electrode foil for an electrolyte capacitor
    Patent number: 4969974
    Abstract: In the method for making electrode foil for an aluminum electrolyte capacitor, in order to obtain a formation layer of aluminum foil having superior waterproof nature and good stability, surface-roughened aluminum foil has hydration treatment, first formation treatment, dipping in aqueous solution of ammonium dihydrogen phosphate and second formation.
    Type: Grant
    Filed: August 2, 1989
    Date of Patent: November 13, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromu Kunugihara, Kazuo Okamura, Fumio Kudo, Ryoichi Shimatani, Nobuyoshi Kanzaki
  • Method for producing foil electrodes for electrolytic capacitor
    Patent number: 4276129
    Abstract: Optimum conditions, employed in an etching process of an aluminum foil for use in an electrolytic capacitor, are selected and combined together for realizing an extension of the effective surface area of the foil. This extension also gives an enlargement of the electrostatic capacitance of the foil electrode as well as an enhancement of the mechanical strength of the foil itself, the latter had been considered to be hardly compatible with the former.
    Type: Grant
    Filed: June 25, 1980
    Date of Patent: June 30, 1981
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuyoshi Kanzaki, Kenji Toyama, Katsutoshi Nakano, Ryoichi Shimatani, Fumio Kudo
  • Method for producing foil electrodes for electrolytic capacitor
    Patent number: RE32512
    Abstract: Optimum conditions, employed in an etching process of an aluminum foil for use in an electrolytic capacitor, are selected and combined together for realizing an extension of the effective surface area of the foil. This extension also gives an enlargement of the electrostatic capacitance of the foil electrode as well as an enhancement of the mechanical strength of the foil itself, the latter had been considered to be hardly compatible with the former.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: September 29, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuyoshi Kanzaki, Kenji Toyama, Katsutoshi Nakano, Ryoichi Shimatani, Fumio Kudo