Patents by Inventor Hisatoshi Matsumoto

Hisatoshi Matsumoto 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).

  • Optical window assemblies
    Patent number: 9534494
    Abstract: Optical window assemblies are provided. An example apparatus includes a first fixture defining a fluid flow passageway. The example apparatus also includes a second fixture defining an aperture. The second fixture is coupled to the first fixture. A first optical window is disposed in the aperture. The first optical window has a first end and a second end. The first end is to be in contact with fluid in the fluid flow passageway, and a cross-sectional size of the first optical window decreases from the first end toward the second end along a portion of the first optical window.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: January 3, 2017
    Assignee: Schlumberger Technology Corporation
    Inventors: Akira Kamiya, Stephane Vannuffelen, Kamal Kader, Hua Chen, Hisatoshi Matsumoto
  • Methods and apparatus for downhole fluid analysis
    Patent number: 8908166
    Abstract: Methods and apparatus for downhole fluid analysis are disclosed. An example method includes obtaining first measurements from a first spectrometer and a second spectrometer when a light source is on, obtaining second measurements from the first spectrometer and the second spectrometer when the light source is off and calibrating the first spectrometer based on the first measurements and the second measurements.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: December 9, 2014
    Assignee: Schlumber Technology Corporation
    Inventors: Hisatoshi Matsumoto, Hua Chen, Akira Kamiya, Stephane Vannuffelen
  • Optical Window Assemblies
    Publication number: 20140240862
    Abstract: Optical window assemblies are disclosed herein. An example apparatus includes a first fixture defining a fluid flow passageway. The example apparatus also includes a second fixture defining an aperture. The second fixture is coupled to the first fixture. A first optical window is disposed in the aperture. The first optical window has a first end and a second end. The first end is to be in contact with fluid in the fluid flow passageway, and a cross-sectional size of the first optical window decreases from the first end toward the second end along a portion of the first optical window.
    Type: Application
    Filed: February 25, 2013
    Publication date: August 28, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Akira Kamiya, Stephane Vannuffelen, Kamal Kader, Hua Chen, Hisatoshi Matsumoto
  • Methods and Apparatus for Downhole Fluid Analysis
    Publication number: 20140176946
    Abstract: Methods and apparatus for downhole fluid analysis are disclosed. An example method includes obtaining first measurements from a first spectrometer and a second spectrometer when a light source is on, obtaining second measurements from the first spectrometer and the second spectrometer when the light source is off and calibrating the first spectrometer based on the first measurements and the second measurements.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Hisatoshi Matsumoto, Hua Chen, Akira Kamiya, Stephane Vannuffelen