Patents by Inventor Derek Robert Oberreit

Derek Robert Oberreit 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).

  • Drift tube ion mobility spectrometer for aerosol measurement
    Patent number: 9207207
    Abstract: A drift tube ion mobility spectrometry sample introduction scheme allows introduction of a sample packet at ground voltages. The sample packet of ionized particles is captured by subjecting particles within a defined region to an electric field at an elevated voltage. The ionized particles in the captured packet then migrate through the drift tube down the voltage gradient according to their electrical mobility. The particles are directed to a high sensitivity detector, such as a condensation particle counter (CPC), for detection.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: December 8, 2015
    Assignee: Regents of the University of Minnesota
    Inventors: Derek Robert Oberreit, Christopher Joseph Hogan, Jr.
  • DRIFT TUBE ION MOBILITY SPECTROMETER FOR AEROSOL MEASUREMENT
    Publication number: 20150115147
    Abstract: A drift tube ion mobility spectrometry sample introduction scheme allows introduction of a sample packet at ground voltages. The sample packet of ionized particles is captured by subjecting particles within a defined region to an electric field at an elevated voltage. The ionized particles in the captured packet then migrate through the drift tube down the voltage gradient according to their electrical mobility. The particles are directed to a high sensitivity detector, such as a condensation particle counter (CPC), for detection.
    Type: Application
    Filed: May 14, 2013
    Publication date: April 30, 2015
    Inventors: Derek Robert Oberreit, Christopher Joseph Hogan, Jr.