Patents by Inventor James W. C. White

James W. C. White 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).

  • Liquid sample evaporator for vapor analysis
    Patent number: 8181544
    Abstract: Preparation methods for introducing liquid samples to gas analysis instruments include 1) complete evaporation of a liquid sample in a sample chamber, and 2) allowing the sample vapor in the sample chamber to equilibrate for a predetermined time. An inert carrier gas (e.g., dry nitrogen or zero air) is also admitted to the sample chamber. After equilibration, the sample vapor is admitted as a conditioned sample to an analysis instrument. Preferably, the predetermined equilibration time is sufficiently long that the sample vapor in the sample chamber becomes substantially homogeneous with respect to both concentration and isotopic ratio. Vapor derived from a liquid calibration standard in this manner can be employed as an accurate gas-phase calibration reference.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: May 22, 2012
    Assignees: Picarro, Inc., The Regents of the University of Colorado
    Inventors: Eric Crosson, Bruce A. Richman, Bruce H. Vaughn, James W. C. White
  • Liquid sample evaporator for vapor analysis
    Publication number: 20100122564
    Abstract: Preparation methods for introducing liquid samples to gas analysis instruments include 1) complete evaporation of a liquid sample in a sample chamber, and 2) allowing the sample vapor in the sample chamber to equilibrate for a predetermined time. An inert carrier gas (e.g., dry nitrogen or zero air) is also admitted to the sample chamber. After equilibration, the sample vapor is admitted as a conditioned sample to an analysis instrument. Preferably, the predetermined equilibration time is sufficiently long that the sample vapor in the sample chamber becomes substantially homogeneous with respect to both concentration and isotopic ratio. Vapor derived from a liquid calibration standard in this manner can be employed as an accurate gas-phase calibration reference.
    Type: Application
    Filed: November 18, 2008
    Publication date: May 20, 2010
    Inventors: Eric Crosson, Bruce A. Richman, Bruce H. Vaughn, James W. C. White