Patents by Inventor Michael A. Pardee

Michael A. Pardee 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).

  • Cryotrap for air pollution analyzer
    Patent number: 5349833
    Abstract: A cryotrap for an air pollution analyzer having a core with an axial opening for receiving a cooling gas expander, a length of tubing carried on the core defining a gas flow path around the gas expander, and an electric heater on the core, with the tubing disposed between the heater and expander. The core has a helical groove around the exterior thereof, with the length of tubing positioned in the groove, and the heater positioned around the core over the tubing. A Stirling linear drive cooler charged with helium and having a gas compressor connected to one end of the gas expander with the other end of the expander positioned in the axial opening of the core.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: September 27, 1994
    Assignee: Xontech, Inc.
    Inventors: Michael A. Pardee, Matthias J. C. Yoong