Patents by Inventor Tatsuru HATAE

Tatsuru HATAE 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).

  • Publication number: 20240304395
    Abstract: The present disclosure provides an electrolytic capacitor for middle or high voltage application of 160 V or more, which can suppress the total amount of gas generated inside the electrolytic capacitor. An electrolytic capacitor includes anode foil on which dielectric oxide film is formed, and a cathode body. The cathode body includes cathode foil formed of valve action metal and a carbon layer formed on the cathode foil. The anode foil and the cathode body have capacitance so that when capacitance X of the anode foil per unit area is 1, ratio of capacitance Y of the cathode body per the same unit area is equal to or more than 10.
    Type: Application
    Filed: January 26, 2022
    Publication date: September 12, 2024
    Inventors: Kazuhiro NAGAHARA, Tatsuru HATAE, Kazuya KOSEKI, Atsushi YOSHIDA, Makoto TOMINAGA, Riho Gumilar MAEDA
  • Publication number: 20240170226
    Abstract: Provide is an electrolytic capacitor for a middle-to-high voltage application that is equal to or higher than 100 V which suppresses the total amount of gas to be produced in the electrolytic capacitor. The anode foil of the electrolytic capacitor includes an enlarged surface portion provided with tunnel-shape pits formed from the foil surface in the thickness direction of the foil, and a dielectric oxide film formed on the surface of the enlarged surface portion. The cathode body of the electrolytic capacitor includes a cathode foil formed of a valve acting metal, and a carbon layer formed on the cathode foil.
    Type: Application
    Filed: December 29, 2023
    Publication date: May 23, 2024
    Inventors: Atsushi YOSHIDA, Makoto TOMINAGA, Kazuhiro NAGAHARA, Kazuya KOSEKI, Tatsuru HATAE
  • Publication number: 20240105393
    Abstract: A cathode and an electrolytic capacitor including the cathode which can suppress production of hydrogen gas are provided. The cathode of the electrolytic capacitor includes cathode foil formed of valve action metal and a conductive layer formed on a surface of the cathode foil. A natural immersion potential of the cathode foil when immersed in an electrolyte solution is at a higher side than a natural immersion potential of reference cathode foil formed of the valve action metal with purity of 99.9%.
    Type: Application
    Filed: November 18, 2023
    Publication date: March 28, 2024
    Inventors: Kazuhiro NAGAHARA, Tatsuru HATAE, Kazuya KOSEKI, Atsushi YOSHIDA, Makoto TOMINAGA
  • Publication number: 20220415582
    Abstract: Provide is an electrolytic capacitor for a middle-to-high voltage application that is equal to or higher than 100 V which suppresses the total amount of gas to be produced in the electrolytic capacitor. The anode foil of the electrolytic capacitor includes an enlarged surface portion provided with tunnel-shape pits formed from the foil surface in the thickness direction of the foil, and a dielectric oxide film formed on the surface of the enlarged surface portion. The cathode body of the electrolytic capacitor includes a cathode foil formed of a valve acting metal, and a carbon layer formed on the cathode foil.
    Type: Application
    Filed: December 16, 2020
    Publication date: December 29, 2022
    Inventors: Atsushi YOSHIDA, Makoto TOMINAGA, Kazuhiro NAGAHARA, Kazuya KOSEKI, Tatsuru HATAE
  • Publication number: 20220384117
    Abstract: A cathode and an electrolytic capacitor including the cathode which can suppress production of hydrogen gas are provided. The cathode of the electrolytic capacitor includes cathode foil formed of valve action metal and a conductive layer formed on a surface of the cathode foil. A natural immersion potential of the cathode foil when immersed in an electrolyte solution is at a higher side than a natural immersion potential of reference cathode foil formed of the valve action metal with purity of 99.9%.
    Type: Application
    Filed: September 29, 2021
    Publication date: December 1, 2022
    Inventors: Kazuhiro NAGAHARA, Tatsuru HATAE, Kazuya KOSEKI, Atsushi YOSHIDA, Makoto TOMINAGA
  • Publication number: 20220367122
    Abstract: A cathode and an electrolytic capacitor including the cathode which can suppress production of hydrogen gas are provided. The cathode of the electrolytic capacitor comprising cathode foil formed of valve action metal, and a conductive layer formed on a surface of the cathode foil. When current in a range of current density of leakage current of the electrolytic capacitor flows by electrochemical polarization, potential corresponding to said current is at a higher side than a natural immersion potential of reference cathode foil formed of the valve action metal with purity of 99.9%.
    Type: Application
    Filed: September 29, 2021
    Publication date: November 17, 2022
    Inventors: Kazuhiro NAGAHARA, Tatsuru HATAE, Kazuya KOSEKI, Atsushi YOSHIDA, Makoto TOMINAGA