Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2011-01-04
2011-01-04
Pham, Hoa Q (Department: 2886)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C250S343000, C436S134000
Reexamination Certificate
active
07864322
ABSTRACT:
A method for detecting a gas phase constituent such as carbon monoxide, nitrogen dioxide, hydrogen, or hydrocarbons in a gas comprising oxygen such as air, includes providing a sensing material or film having a metal embedded in a catalytically active matrix such as gold embedded in a yttria stabilized zirconia (YSZ) matrix. The method may include annealing the sensing material at about 900° C., exposing the sensing material and gas to a temperature above 400° C., projecting light onto the sensing material, and detecting a change in the absorption spectrum of the sensing material due to the exposure of the sensing material to the gas in air at the temperature which causes a chemical reaction in the sensing material compared to the absorption spectrum of the sensing material in the absence of the gas. Systems employing such a method are also disclosed.
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Carpenter Michael A.
Sirinakis George
Heslin Rothenberg Farley & & Mesiti P.C.
Pham Hoa Q
The Research Foundation of State University of New York
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