Patents by Inventor Stephen B. Hunt

Stephen B. Hunt 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).

  • Gas chromatograph sample and column-switching valve
    Patent number: 6453725
    Abstract: A multiport, diaphragm sealed valve suitable for use as both a sampling and column switching valve. The valve is constructed to internally block fluid communication between one or more pairs of ports in a valve operating mode. Such blocking may be used to conserve carrier gas when the valve is in the ON position.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: September 24, 2002
    Assignee: Siemens Energy & Automation
    Inventors: Robert W. Dahlgren, Robert K. Bade, Stephen B. Hunt