Patents by Inventor John William Pohlman

John William Pohlman 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).

  • Discrete sample introduction module (DSIM) for gas analysis by laser absorption spectroscopy
    Patent number: 11674892
    Abstract: A Discrete Sample Introduction Module (DSIM) apparatus includes an internal tubing system to receive into the DSIM apparatus a discrete gas sample having a received concentration. A plurality of valves selectively partitions the internal tubing system to form a plurality of loops corresponding to a plurality of loop volumes to contain the discrete gas sample. The plurality of loop volumes receives a carrier gas to dilute the discrete gas sample to a plurality of preselected dilutions. The DSIM apparatus circulates a given one of the plurality of preselected dilutions for analysis by a spectrometer coupled to the DSIM apparatus.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: June 13, 2023
    Assignee: U.S. Geological Survey
    Inventors: John William Pohlman, Emile Marcel Bergeron, Michael Andrew Casso
  • DISCRETE SAMPLE INTRODUCTION MODULE (DSIM) FOR GAS ANALYSIS BY LASER ABSORPTION SPECTROSCOPY
    Publication number: 20210310936
    Abstract: A Discrete Sample Introduction Module (DSIM) apparatus includes an internal tubing system to receive into the DSIM apparatus a discrete gas sample having a received concentration. A plurality of valves selectively partitions the internal tubing system to form a plurality of loops corresponding to a plurality of loop volumes to contain the discrete gas sample. The plurality of loop volumes receives a carrier gas to dilute the discrete gas sample to a plurality of preselected dilutions. The DSIM apparatus circulates a given one of the plurality of preselected dilutions for analysis by a spectrometer coupled to the DSIM apparatus.
    Type: Application
    Filed: September 14, 2020
    Publication date: October 7, 2021
    Inventors: John William Pohlman, Emile Marcel Bergeron, Michael Andrew Casso