Patents by Inventor Kenji Touyama

Kenji Touyama 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 etching electrode foil aluminum electrolytic capacitors
    Patent number: 4741812
    Abstract: An improved etching method for enhancing the operation rate of manufacturing equipment as well as manufacturing electrode foil with a high enlarging factor in a manufacturing method for electrode foil for aluminum electrolytic capacitors, which enables one to obtain an electrode foil with a high surface enlarging factor by performing electrolytic etching, using alternating current in an acidic hydrochloric acid solution, which does not produce white powder, under the conditions of the ratio of the negative to the positive cycle part of the electric charge impressed on the aluminum foil, being in a range between 0.2 and 2.0 and the duty ratio being 51-90%.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: May 3, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kouichi Kojima, Masanori Okabayashi, Nobuyoshi Kanzaki, Kenji Touyama, Ryouichi Shimatani