Patents by Inventor Wenqing Cao

Wenqing Cao 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).

  • Hydrogen sensor
    Patent number: 7839499
    Abstract: A hydrogen sensor for detecting/quantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces light emission from excited hydrogen. A power supply provides power to the microplasma generator, and a spectrometer generates an emission spectrum from the light emission. A programmable computer is adapted for determining whether or not the gas sample includes hydrogen, and for quantitating the amount of hydrogen and/or hydrogen isotopes are present in the gas sample.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: November 23, 2010
    Assignee: Los Alamos National Security, LLC
    Inventors: Yixiang Duan, Quanxi Jia, Wenqing Cao
  • Hydrogen sensor
    Publication number: 20090201500
    Abstract: A hydrogen sensor for detecting/quantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces light emission from excited hydrogen. A power supply provides power to the microplasma generator, and a spectrometer generates an emission spectrum from the light emission. A programmable computer is adapted for determining whether or not the gas sample includes hydrogen, and for quantitating the amount of hydrogen and/or hydrogen isotopes are present in the gas sample.
    Type: Application
    Filed: February 13, 2008
    Publication date: August 13, 2009
    Inventors: Yixiang Duan, Quanxi Jia, Wenqing Cao
  • Apparatus and method for monitoring breath acetone and diabetic diagnostics
    Patent number: 7417730
    Abstract: An apparatus and method for monitoring diabetes through breath acetone detection and quantitation employs a microplasma source in combination with a spectrometer. The microplasma source provides sufficient energy to produce excited acetone fragments from the breath gas that emit light. The emitted light is sent to the spectrometer, which generates an emission spectrum that is used to detect and quantify acetone in the breath gas.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: August 26, 2008
    Assignee: Los Alamos National Security, LLC
    Inventors: Yixiang Duan, Wenqing Cao
  • Apparatus and method for monitoring breath acetone and diabetic diagnostics
    Publication number: 20070229818
    Abstract: An apparatus and method for monitoring diabetes through breath acetone detection and quantitation employs a microplasma source in combination with a spectrometer. The microplasma source provides sufficient energy to produce excited acetone fragments from the breath gas that emit light. The emitted light is sent to the spectrometer, which generates an emission spectrum that is used to detect and quantify acetone in the breath gas.
    Type: Application
    Filed: March 31, 2006
    Publication date: October 4, 2007
    Inventors: Yixiang Duan, Wenqing Cao