Patents by Inventor Motoi Wada

Motoi Wada 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: 11295939
    Abstract: An analytical device includes: a reaction unit into which an ion derived from a sample component is introduced; a radical generation unit that generates a radical by vacuum discharge and comprises a raw material introduction chamber into which a plasma raw material is introduced; a connection part that introduces the radical generated in the radical generation unit into a vacuum chamber, the vacuum chamber having a pressure lower than a pressure of the raw material introduction chamber and being connected to the reaction unit; and a separation unit that separates a generated ion generated by a reaction with the radical introduced via the connection part into the reaction unit according to m/z and/or ion mobility, wherein an inner diameter of a cross section of the connection part is equal to or less than 20 millimeters.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 5, 2022
    Assignees: SHIMADZU CORPORATION, THE DOSHISHA
    Inventors: Hidenori Takahashi, Motoi Wada, Yuji Shimabukuro
  • Patent number: 10998177
    Abstract: An ion analyzer that generates product ions from precursor ions derived from a sample component and analyzes the product ions includes a reaction chamber (2) into which the precursor ion is introduced, a radical generation chamber (51), a material gas supply source (52) configured to introduce material gas into the radical generation chamber (51), a vacuum evacuator (57) configured to evacuate the radical generation chamber (51), a vacuum discharge unit (53) configured to generate a vacuum discharge in the radical generation chamber (51), a radical irradiation unit (54) configured to irradiate an inside of the reaction chamber (2) with radicals generated from the material gas in the radical generation chamber (51), and a separation and detection (3) configured to separate and detect product ions generated from the precursor ion by reaction with the radicals according to at least one of a mass-to-charge ratio and ion mobility.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: May 4, 2021
    Assignees: SHIMADZU CORPORATION, THE DOSHISHA
    Inventors: Hidenori Takahashi, Motoi Wada
  • Publication number: 20200111654
    Abstract: An ion analyzer that generates product ions from precursor ions derived from a sample component and analyzes the product ions includes a reaction chamber (2) into which the precursor ion is introduced, a radical generation chamber (51), a material gas supply source (52) configured to introduce material gas into the radical generation chamber (51), a vacuum evacuator (57) configured to evacuate the radical generation chamber (51), a vacuum discharge unit (53) configured to generate a vacuum discharge in the radical generation chamber (51), a radical irradiation unit (54) configured to irradiate an inside of the reaction chamber (2) with radicals generated from the material gas in the radical generation chamber (51), and a separation and detection (3) configured to separate and detect product ions generated from the precursor ion by reaction with the radicals according to at least one of a mass-to-charge ratio and ion mobility.
    Type: Application
    Filed: March 29, 2018
    Publication date: April 9, 2020
    Applicants: SHIMADZU CORPORATION, THE DOSHISHA
    Inventors: Hidenori TAKAHASHI, Motoi WADA
  • Publication number: 20190333748
    Abstract: An analytical device includes: a reaction unit into which an ion derived from a sample component is introduced; a radical generation unit that generates a radical by vacuum discharge and comprises a raw material introduction chamber into which a plasma raw material is introduced; a connection part that introduces the radical generated in the radical generation unit into a vacuum chamber, the vacuum chamber having a pressure lower than a pressure of the raw material introduction chamber and being connected to the reaction unit; and a separation unit that separates a generated ion generated by a reaction with the radical introduced via the connection part into the reaction unit according to m/z and/or ion mobility, wherein an inner diameter of a cross section of the connection part is equal to or less than 20 millimeters.
    Type: Application
    Filed: April 25, 2019
    Publication date: October 31, 2019
    Applicants: SHIMADZU CORPORATION, THE DOSHISHA
    Inventors: Hidenori TAKAHASHI, Motoi WADA, Yuji SHIMABUKURO
  • Patent number: 9658191
    Abstract: An atomic flux measurement device for measuring the amount of dissociated atomic flux produced by discharge and emitted from a plasma generation cell into a vacuum camber. The atomic flux measurement device includes a counter electrode body including a pair of first and second sheet-like electrodes that are arranged substantially parallel to each other with a predetermined spacing between them, a direct-current power supply configured to maintain the first sheet-like electrode at a negative potential so that atoms attached to the inner surface of the sheet-like electrode undergo self-ionization and to apply a direct-current voltage between the first and second sheet-like electrodes so that a current flows between the first and second sheet-like electrodes, and a direct-current ammeter configured to measure a current flowing due to electrons emitted by the self-ionization of the dissociated atoms attached to the inner surface of the first sheet-like electrode.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: May 23, 2017
    Assignee: THE DOSHISHA
    Inventors: Tadashi Ohachi, Motoi Wada, Osamu Ariyada, Nobuhiko Yamabe
  • Patent number: 4881026
    Abstract: Disclosed is a method and apparatus which can detect progress of degradation of a sodium-sulfur cell and predict possibility of final breakdown of the cell in a very near future before such a final breakdown of the cell actually occurs. The method and apparatus for diagnosing the presence or absence of an abnormal state in the sodium-sulfur cell, containing a porous electrical conductive material impregnated with molten sulfur or sodium polysulfide as its positive electrode reactant and containing sodium as its negative electrode reactant, comprises observing the operating voltage of the cell during charging and discharging so as to detect occurrence of a minute ripple in the operating voltage, and, when the amplitude of the ripple and the frequency of occurrence of the ripple increases as a result of repeated cycles of charging and discharging, deciding that degradation of the cell has progressed to an extent that final breakdown of the cell will occur in a very near future.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: November 14, 1989
    Assignees: Hitachi, Ltd., The Tokyo Electric Power Co., Ltd.
    Inventors: Yasumasa Ishida, Hiroyuki Kawamoto, Motoi Wada, Hisamitu Hatoh, Yoshiteru Miyatake, Sadao Mori, Eiji Takahashi