Patents by Inventor Donald B. Barnett

Donald B. Barnett 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).

  • Automated thermal desorption unit
    Patent number: 4976924
    Abstract: A thermal desorption unit includes a base plate and a pair of spaced apart plates arranged perpendicularly to the base plate and positioned to hold a magazine of tubes between the spaced apart plates. The unit includes apparatus for selectively extracting, handling, heating, and reinserting a tube from the magazine. The tubes are heated to drive off the contents and flushed to clean the inside of the tubes.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: December 11, 1990
    Assignee: Her Majesty the Queen in Right of Canada, as represented by the Minister of National Defence
    Inventors: John M. McAndless, James R. Hancock, Donald B. Barnett, Orville J. Olm, Terry J. A. Locke, John Maybank
  • "Polymer packed minitube vapor sampling system"
    Patent number: 4869117
    Abstract: An air sampler includes a magazine having a plurality of sampling tubes, and an inlet and an outlet at a sampling position. A tube advancing mechanism sequentially advances the sampling tubes to and from the sampling position. A tube sealing arrangement is provided at the sampling position. An air pump draws air through the inlet, a sampling tube at the sampling position, and the outlet. A control sequentially operates the magazine, obtaining air samples within the sampling tubes.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: September 26, 1989
    Assignee: Her Majesty the Queen in Right of Canada as represented by the Minister of National Defence
    Inventors: John M. McAndless, James R. Hancock, Donald B. Barnett, Orville J. Olm, Terry J. A. Locke, John Maybank