Patents by Inventor Kazushi SASAKURA

Kazushi SASAKURA 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).

  • Quadrupole mass spectrometer, quadrupole mass spectrometry method, and program storage medium storing program for quadrupole mass spectrometer
    Patent number: 11270878
    Abstract: A quadrupole mass spectrometer includes an ion source that ionizes a sample, a filter unit that includes a quadrupole and separates ions generated from the ion source according to mass, a detector that detects ions passing through the filter unit, a filter voltage controller that controls a filter voltage applied to the quadrupole to switch between a blocking mode in which ions entering the filter unit are not allowed to impinge on the detector and a passing mode in which ions entering the filter unit are allowed to impinge on the detector, the filter voltage including a radio-frequency voltage and a direct-current voltage, a baseline computing unit that computes a baseline based on outputs of the detector in the blocking mode, and an analyzing unit that outputs an analysis result of the sample based on outputs of the detector in the passing mode and the computed baseline.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: March 8, 2022
    Assignees: HORIBA STEC, CO., LTD., HORIBA, LTD.
    Inventors: Kohei Sasai, Kazushi Sasakura, Toshihiro Ikeyama, Takahito Inoue, Hiroshi Uchihara
  • QUADRUPOLE MASS SPECTROMETER, QUADRUPOLE MASS SPECTROMETRY METHOD, AND PROGRAM STORAGE MEDIUM STORING PROGRAM FOR QUADRUPOLE MASS SPECTROMETER
    Publication number: 20210166932
    Abstract: A quadrupole mass spectrometer includes an ion source that ionizes a sample, a filter unit that includes a quadrupole and separates ions generated from the ion source according to mass, a detector that detects ions passing through the filter unit, a filter voltage controller that controls a filter voltage applied to the quadrupole to switch between a blocking mode in which ions entering the filter unit are not allowed to impinge on the detector and a passing mode in which ions entering the filter unit are allowed to impinge on the detector, the filter voltage including a radio-frequency voltage and a direct-current voltage, a baseline computing unit that computes a baseline based on outputs of the detector in the blocking mode, and an analyzing unit that outputs an analysis result of the sample based on outputs of the detector in the passing mode and the computed baseline.
    Type: Application
    Filed: November 20, 2020
    Publication date: June 3, 2021
    Applicants: HORIBA STEC, Co., Ltd., HORIBA, Ltd.
    Inventors: Kohei SASAI, Kazushi SASAKURA, Toshihiro IKEYAMA, Takahito INOUE, Hiroshi UCHIHARA