Patents by Inventor Norifumi Kitada

Norifumi Kitada 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).

  • Laser ionization mass spectroscope
    Patent number: 7521671
    Abstract: The invention provides an ultra-sonic jet multi-photon resonance ionization type mass analyzing device. The laser beam ionization mass analyzing device includes a pulsed gas ejecting device 12 for ejecting in pulse mode carrier gas containing sample molecules into a vacuum vessel 17, a laser beam irradiation system for irradiating laser beam for selective photo-reaction of sample molecules in said pulsed gas, repeller and extraction electrodes 18 and 19 generating an electric field for extraction of sample molecular ions generated by the photo reaction and a mass analyzing device 26 for mass analysis of extracted sample molecular ions. The laser beam irradiation system is set to irradiate laser beam to sample molecules near a position whereat a pressure time distribution of pulsed gas translating in the vacuum vessel 17 transitions from a flat-top pressure distribution to a triangular pressure distribution.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: April 21, 2009
    Assignee: Kabushiki Kaisha IDX Technologies
    Inventors: Naotoshi Kirihara, Norifumi Kitada, Kenji Takahashi, Haruaki Yoshida, Mizuho Tanaka, Yasuo Suzuki
  • Method of Analyzing Dioxins
    Publication number: 20080131973
    Abstract: A dioxin analyzing method sensitively detecting dioxins is provided.
    Type: Application
    Filed: March 24, 2005
    Publication date: June 5, 2008
    Inventors: Naotoshi Kirihara, Norifumi Kitada, Kenji Takahashi, Haruaki Yoshida, Mizuho Tanaka, Yasuo Suzuki
  • Laser Ionization Mass Spectroscope
    Publication number: 20070272849
    Abstract: The invention provides an ultra-sonic jet multi-photon resonance ionization type mass analyzing device. The laser beam ionization mass analyzing device includes a pulsed gas ejecting device 12 for ejecting in pulse mode carrier gas containing sample molecules into a vacuum vessel 17, a laser beam irradiation system for irradiating laser beam for selective photo-reaction of sample molecules in said pulsed gas, repeller and extraction electrodes 18 and 19 generating an electric field for extraction of sample molecular ions generated by the photo reaction and a mass analyzing device 26 for mass analysis of extracted sample molecular ions. The laser beam irradiation system is set to irradiate laser beam to sample molecules near a position whereat a pressure time distribution of pulsed gas translating in the vacuum vessel 17 transitions from a flat-top pressure distribution to a triangular pressure distribution.
    Type: Application
    Filed: March 15, 2005
    Publication date: November 29, 2007
    Inventors: Naotoshi Kirihara, Norifumi Kitada, Kenji Takahashi, Haruaki Yoshida, Mizuho Tanaka, Yasuo Suzuki
  • Method of analyzing dioxins
    Publication number: 20070108391
    Abstract: A dioxin analyzing method sensitively detecting dioxins is provided.
    Type: Application
    Filed: March 24, 2005
    Publication date: May 17, 2007
    Inventors: Toru Shiomitsu, Hideki Nagano, Naotoshi Kirihara, Norifumi Kitada, Kenji Takahashi, Haruaki Yoshida, Mizuho Tanaka, Yasuo Suzuki