Patents by Inventor John M. Ondov

John M. Ondov 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).

  • System and method for collecting samples of atmospheric aerosol particles for near-real time analysis
    Patent number: 6732569
    Abstract: A system and method for collecting sub-hourly ambient particulate matter samples at flow rates of 170-260 L/min is suitable for either on- or off-line near-real-time multielement analysis by graphite furnace atomic absorption spectrometry and other techniques for which a sample in slurry form is advantageous. Condensational growth of water vapor was used to grow fine particles by steam injection. The grown droplets are concentrated using a virtual impactor, then separated from the airstream using a real impactor. The particles are collected in a liquid slurry which is hydraulically delivered to sample vials every 30 minutes for offline analysis, or directly delivered into the graphite furnace for atomic absorption spectrometry analysis.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: May 11, 2004
    Assignee: University of Maryland
    Inventors: John M. Ondov, Christopher B. Kidwell, Thomas M. Tuch
  • System and method for collecting samples of atmospheric aerosol particles for near-real time analysis
    Publication number: 20020134137
    Abstract: A system and method for collecting sub-hourly ambient particulate matter samples at flow rates of 170-260 L/min is suitable for either on- or off-line near-real-time multielement analysis by graphite furnace atomic absorption spectrometry and other techniques for which a sample in slurry form is advantageous. Condensational growth of water vapor was used to grow fine particles by steam injection. The grown droplets are concentrated using a virtual impactor, then separated from the airstream using a real impactor. The particles are collected in a liquid slurry which is hydraulically delivered to sample vials every 30 minutes for offline analysis, or directly delivered into the graphite furnace for atomic absorption spectrometry analysis.
    Type: Application
    Filed: January 25, 2002
    Publication date: September 26, 2002
    Inventors: John M. Ondov, Christopher B. Kidwell, Thomas M. Tuch