Patents by Inventor Hisao Ohishi

Hisao Ohishi 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).

  • Electrode foil for aluminum electrolytic capacitor and method of manufacturing same
    Patent number: 6611422
    Abstract: Sub pits are suppressed from branching in a surface layer of an aluminum foil, and an electrode foil for an aluminum electrolytic capacitor with a large electrostatic capacitance and a method of manufacturing the same are provided. A large number of main pits are formed by etching on both surfaces of the aluminum foil to extend from the surfaces in a thickness direction of the foil, sub pits are formed to branch away from the main pits for a range from a vicinity of a surface layer portion of each main pits excluding the surface layer portion, to inner ends of the main pits. Since the sub pits are not formed in the surface layer of the aluminum foil, the sub pits can be increased in density effectively to the electrostatic capacitance, allowing the electrode foil for the aluminum electrolytic capacitor to have high mechanical strength and high electrostatic capacitance.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: August 26, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuhiko Yamazaki, Kazuaki Nakanishi, Shinichi Yamaguchi, Hisao Ohishi, Ryoichi Shimatani, Akihiro Yamaguchi, Kazuko Hasegawa
  • Electrode foil for aluminum electrolytic capacitor and method of manufacturing same
    Publication number: 20030007312
    Abstract: Sub pits are suppressed from branching in a surface layer of an aluminum foil, and an electrode foil for an aluminum electrolytic capacitor with a large electrostatic capacitance and a method of manufacturing the same are provided. A large number of main pits are formed by etching on both surfaces of the aluminum foil to extend from the surfaces in a thickness direction of the foil, sub pits are formed to branch away from the main pits for a range from a vicinity of a surface layer portion of each main pits excluding the surface layer portion, to inner ends of the main pits. Since the sub pits are not formed in the surface layer of the aluminum foil, the sub pits can be increased in density effectively to the electrostatic capacitance, allowing the electrode foil for the aluminum electrolytic capacitor to have high mechanical strength and high electrostatic capacitance.
    Type: Application
    Filed: September 5, 2002
    Publication date: January 9, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuhiko Yamazaki, Kazuaki Nakanishi, Shinichi Yamaguchi, Hisao Ohishi, Ryoichi Shimatani, Akihiro Yamaguchi, Kazuko Hasegawa
  • Electrode foil for aluminum electrolytic capacitor and method of manufacturing the same
    Publication number: 20020149902
    Abstract: Sub pits are suppressed from branching in a surface layer of an aluminum foil, and an electrode foil for an aluminum electrolytic capacitor with a large electrostatic capacitance and a method of manufacturing the same are provided. A large number of main pits are formed by etching on both surfaces of the aluminum foil to extend from the surfaces in a thickness direction of the foil, sub pits are formed to branch away from the main pits for a range from a vicinity of a surface layer portion of each main pits excluding the surface layer portion, to inner ends of the main pits. Since the sub pits are not formed in the surface layer of the aluminum foil, the sub pits can be increased in density effectively to the electrostatic capacitance, allowing the electrode foil for the aluminum electrolytic capacitor to have high mechanical strength and high electrostatic capacitance.
    Type: Application
    Filed: February 14, 2002
    Publication date: October 17, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuhiko Yamazaki, Kazuaki Nakanishi, Shinichi Yamaguchi, Hisao Ohishi, Ryoichi Shimatani, Akihiro Yamaguchi, Kazuko Hasegawa