Measuring and testing – Gas analysis – By vibration
Reexamination Certificate
2005-03-08
2005-03-08
Larkin, Daniel S. (Department: 2856)
Measuring and testing
Gas analysis
By vibration
C073S023340, C073S632000
Reexamination Certificate
active
06862917
ABSTRACT:
An apparatus and method for detecting gases, gasified agents or other analytes. The apparatus includes a solid body having a first surface area and a second surface area. A first, preferably polymeric, coating is superimposed on the first surface area of the solid body. A second, preferably polymeric, coating is superimposed on the second surface area of this solid body. The first coating and the second coating are different materials which adsorb different agents at different rates. A wave propagating transducer is positioned adjacent the solid body to propagate a first wavefront adjacent the first surface area of the solid body. This wave propagating transducer also propagates a second wavefront adjacent the second surface area of the solid body. These first and second wavefronts interfere to produce an interference pattern which is unique to the particular agent which is adsorbed by the first and second coatings. A transducer array records this interference pattern to identify the agent based on the nature of this interference pattern which will be uniquely characteristic of the agent.
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Apostolos John T.
Russo Leonard E.
Bae Systems Information and Electronic Systems Integration Inc.
Larkin Daniel S.
Long Daniel J.
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