Patents by Inventor David L. Blair

David L. Blair 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).

  • Hydrocarbon vapor sensor and system
    Patent number: 5150603
    Abstract: A hydrocarbon vapor sensor which is simple and low cost and can easily detect the existence of hydrocarbon vapor. The device is temperature compensated so that a change in resistance due to a change in temperature is avoided and an accurate response is always provided. The sensor can be used in a system in which a number of sensors are provided at various depths to determine whether a leak or a ground spill has occurred.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: September 29, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert A. Boenning, David L. Blair
  • Hydrocarbon vapor sensor and system
    Patent number: 5079944
    Abstract: A hydrocarbon vapor sensor which is simple and low cost and can easily detect the existence of hydrocarbon vapor. The device is temperature compensated so that a change in resistance due to a change in temperature is avoided and an arcurate response is always provided. The sensor can be used in a system in which a number of sensors are provided at various depths to determine whether a leak or a ground spill has occurred.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: January 14, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert A. Boenning, David L. Blair