Patents by Inventor Yusuke Niiori

Yusuke Niiori 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).

  • Patent number: 6501640
    Abstract: An electrochemical capacitor is provided, including an organic electrolyte solution and polarized electrodes immersed in the organic electrolyte solution. As an active substance of the polarized electrodes, the reaction product of an electrochemical reaction of a partially oxidized carbon material that contains fine crystals of graphite-like carbon in an organic electrolyte solution is used. The electrochemical capacitor has a high electrostatic capacity density based on a pseudo-capacity.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: December 31, 2002
    Assignee: NGK Insulators, Ltd.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa
  • Patent number: 6487066
    Abstract: Disclosed is an electric double layer capacitor including polarizable electrodes immersed in an organic electrolyte, wherein a carbon material for forming the polarizable electrode is a carbon material including graphite-like microcrystalline carbon produced by effecting a heat treatment together with at least one of an alkali metal and an alkali metal compound at not less than a temperature at which alkali metal vapor is generated, and an electrostatic capacity is expressed by insertion of ions of a solute of the organic electrolyte into a space between microcrystalline carbon layers of the carbon material. Accordingly, it is possible to achieve an electrostatic capacity and a withstand voltage which exceed those of the conventional electric double layer capacitor based on the activated carbon system.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: November 26, 2002
    Assignees: NGK Insulators, Ltd., Jeol Ltd., Okamura Laboratory Inc.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa, Hitoshi Yoshida, Makoto Takeuchi, Michio Okamura
  • Publication number: 20020163773
    Abstract: An electrochemical capacitor includes: an organic electrolyte solution, and an electrode body including polarized electrodes having, as a main component, a partially oxidized carbon material having fine crystals of graphite-like carbon, a separator, and current collectors, the electrode body being immersed in the organic electrolyte solution, and the polarized electrodes expanding in volume due to charge and contracting in volume due to discharge. Mechanical stress is applied to a carbon material having fine crystals of graphite-like carbon to introduce cracks and/or fractures thereinto, and the carbon material is partially oxidized to give a raw material for the polarized electrodes. The electrochemical capacitor can contribute to an increase in capacity of the capacitor.
    Type: Application
    Filed: February 5, 2002
    Publication date: November 7, 2002
    Applicant: NGK Insulators, Ltd.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa
  • Patent number: 6442015
    Abstract: An electrochemical capacitor wherein electrode members include polarizing electrodes, whose main ingredient is a carbon material having partially oxidized graphite-like microcrystalline carbon, separators, and collectors is immersed in a organic electrolytic solution, the polarizing electrodes expanding on charging and contracting on discharging. Ions with ionic radii of 0.33 nm or less are used as the electrolyte cations of the organic electrolytic solution. The cell container holding electrode members and the electrolytic solution is provided with stress relaxing structure. Either collectors or separators are elastomers. The separators are sponge-like porous insulator with continuous pores.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: August 27, 2002
    Assignee: NGK Insulators, Ltd.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa, Hitoshi Yoshida
  • Patent number: 6309428
    Abstract: A process for producing an electrochemical capacitor including an organic electrolytic solution and electrode bodies immersed in the organic electrolytic solution, each comprising a polarizing electrode (composed mainly of a carbon material containing a partially oxidized, graphite-like microcrystalline carbon), a separator and a collector, in which capacitor each polarizing electrode gives rise to volume expansion when charged and volume contraction when discharged, is provided.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: October 30, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa, Hitoshi Yoshida
  • Patent number: 5974336
    Abstract: An oxide superconductor comprises a base material consisting of a single crystalline oxide, an oxide superconductor film consisting of a Y123 compound and formed on the single crystalline oxide base material, and a coating film consisting essentially of a Ba--Cu--O oxide and covering the surface of the oxide superconductor film, the coating film having a thermal expansion coefficient higher than that of the oxide superconductor film.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: October 26, 1999
    Assignees: Kabushiki Kaisha Toshiba, International Superconductivity Technology Center
    Inventors: Yasuji Yamada, Tamaki Masegi, Junichi Kawashima, Yusuke Niiori, Izumi Hirabayashi
  • Patent number: 5683606
    Abstract: A ceramic heater includes a substrate made of aluminum nitride, a resistive heating element buried in the substrate and made of a metal having a high melting point, and terminals electrically connected to the resistive heating element and buried in said substrate. The terminals are made of a metal having a high melting point and a coefficient of thermal expansion not smaller than that of the substrate. The metal of the resistive heating element has a coefficient of thermal expansion not smaller than that of the substrate. The coefficient of thermal expansion of each of the terminals and the resistive heating element is in a range from 5.0.times.10.sup.-6 /.degree.C. to 8.3.times.10.sup.-6 /.degree.C.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: November 4, 1997
    Assignee: NGK Insulators, Ltd.
    Inventors: Ryusuke Ushikoshi, Atsushi Sakon, Koichi Umemoto, Yusuke Niiori
  • Patent number: 5616024
    Abstract: A ceramic heater composed of a ceramic substrate and a resistant heating element embedded within the ceramic substrate along a predetermined planar pattern is obtained by holding a convolution of a spiral-coiled high melting metallic filament in the above predetermined planar pattern and heat-treating the convolution at a temperature not higher than a primary recrystallization commencement temperature of the high melting metal under a non-oxidative atmosphere to provide the resistant heating element, embedding the resulting resistant heating element within a ceramic shaped body, and then, sintering the ceramic shaped body.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: April 1, 1997
    Assignee: NGK Insulators, Ltd.
    Inventors: Kazuhiro Nobori, Ryusuke Ushikoshi, Koichi Umemoto, Atsushi Sakon, Yusuke Niiori, Masahiro Murasato