Patents by Inventor Ryuuichi Kasahara

Ryuuichi Kasahara 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).

  • Electric double layer capacitor with improved activated carbon electrodes
    Patent number: 7092239
    Abstract: An electric double layer capacitor comprises: a separator; a pair of electrodes separated by the separator, and the electrodes including activated carbon particles and a binder binding the activated carbon particles; and a pair of collectors separated by the pair of electrodes, wherein a density of the electrodes is in the range of 1.4 g/cm3 to 1.8 g/cm3.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: August 15, 2006
    Assignee: NEC Tokin Corporation
    Inventors: Yutaka Nakazawa, Koji Sakata, Ryuuichi Kasahara
  • Electric double layer capacitor and method of forming the same
    Patent number: 6657850
    Abstract: An electrical double layer capacitor includes a capacitor cell structure comprising: a separator; polarization electrodes; collectors; and a gasket, wherein at least a part of at least either one of the collectors and the gasket has a gas permeability coefficient of at least 4.0E-12[m3/(m2·S·Pa)].
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: December 2, 2003
    Assignee: NEC Tokin Corporation
    Inventors: Yutaka Nakazawa, Koji Sakata, Ryuuichi Kasahara
  • Electric double layer capacitor and method of forming the same
    Publication number: 20020191369
    Abstract: An electrical double layer capacitor includes a capacitor cell structure comprising: a separator; polarization electrodes; collectors; and a gasket, wherein at least a part of at least either one of the collectors and the gasket has a gas permeability coefficient of at least 4.0E-12[m3/(m2·S·Pa)].
    Type: Application
    Filed: March 19, 2002
    Publication date: December 19, 2002
    Applicant: NEC CORPORATION
    Inventors: Yutaka Nakazawa, Koji Sakata, Ryuuichi Kasahara
  • Electric double layer capacitor with improved activated carbon electrodes
    Publication number: 20020154467
    Abstract: An electric double layer capacitor comprises: a separator; a pair of electrodes separated by the separator, and the electrodes including activated carbon particles and a binder binding the activated carbon particles; and a pair of collectors separated by the pair of electrodes, wherein a density of the electrodes is in the range of 1.4 g/cm3 to 1.8 g/cm3.
    Type: Application
    Filed: February 6, 2002
    Publication date: October 24, 2002
    Applicant: NEC CORPORATION
    Inventors: Yutaka Nakazawa, Koji Sakata, Ryuuichi Kasahara