Patents by Inventor James L. DeVries

James L. DeVries 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).

  • Quick response humidity chamber
    Patent number: 4177667
    Abstract: An apparatus and technique for changing the characteristics of a fluid mem in order to test static response of sensors within that medium. In particular, in testing the static response of a humidity sensor, a first sealed enclosure surrounds a humidity sensor and is retained within a second sealed enclosure. Both enclosures may be purged to have a predetermined relative humidity, one different from the other. The seal of the first chamber is then broken in such a manner that the fluid of the second enclosure subjects the sensor to a different relative humidity.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: December 11, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Steven R. Rolf, James L. DeVries, T. Ashworth