Patents by Inventor Hitomi Obise

Hitomi Obise 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).

  • Method of controlling mass spectrometer and mass spectrometer
    Patent number: 8115166
    Abstract: A method of controlling a mass spectrometer comprises the steps of: supplying a current to a cathode electrode of an ion source having the cathode electrode and an anode electrode, and ionizing a molecules of a gas to be measured; selecting ions generated in the ion source by mass-to-charge ratio; and detecting an ion current value of the selected ions. When a partial pressure of the gas to be measured is measured based on a detection result of the ion current value, a cathode current is supplied to the cathode electrode such that an emission current flowing between the cathode electrode and the anode electrode becomes constant. When a partial pressure of the gas to be measured is not measured, a constant current having a current value less than that of the cathode current is supplied to the cathode electrode.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: February 14, 2012
    Assignee: ULVAC, Inc.
    Inventors: Toyoaki Nakajima, Yujirou Kurokawa, Tsutomu Yuri, Ryota Tanaka, Jiro Endo, Hitomi Obise
  • Method of controlling mass spectrometer and mass spectrometer
    Patent number: 8013291
    Abstract: A method of controlling a mass spectrometer comprises the steps of: supplying a current to a cathode electrode of an ion source having the cathode electrode and an anode electrode, and ionizing a molecules of a gas to be measured; selecting ions generated in the ion source by mass-to-charge ratio; and detecting an ion current value of the selected ions. When a partial pressure of the gas to be measured is measured based on a detection result of the ion current value, a cathode current is supplied to the cathode electrode such that an emission current flowing between the cathode electrode and the anode electrode becomes constant. When a partial pressure of the gas to be measured is not measured, a constant current having a current value less than that of the cathode current is supplied to the cathode electrode.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: September 6, 2011
    Assignee: Ulvac, Inc.
    Inventors: Toyoaki Nakajima, Yujirou Kurokawa, Tsutomu Yuri, Ryota Tanaka, Jiro Endo, Hitomi Obise
  • METHOD OF CONTROLLING MASS SPECTROMETER AND MASS SPECTROMETER
    Publication number: 20100133429
    Abstract: A method of controlling a mass spectrometer comprises the steps of: supplying a current to a cathode electrode of an ion source having the cathode electrode and an anode electrode, and ionizing a molecules of a gas to be measured; selecting ions generated in the ion source by mass-to-charge ratio; and detecting an ion current value of the selected ions. When a partial pressure of the gas to be measured is measured based on a detection result of the ion current value, a cathode current is supplied to the cathode electrode such that an emission current flowing between the cathode electrode and the anode electrode becomes constant. When a partial pressure of the gas to be measured is not measured, a constant current having a current value less than that of the cathode current is supplied to the cathode electrode.
    Type: Application
    Filed: April 14, 2008
    Publication date: June 3, 2010
    Applicant: ULVAC, INC.
    Inventors: Toyoaki Nakajima, Yujirou Kurokawa, Tsutomu Yuri, Ryota Tanaka, Jiro Endo, Hitomi Obise