Measuring and testing – Gas analysis – Detector detail
Reexamination Certificate
2008-05-06
2008-05-06
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
Detector detail
C073S019110, C204S424000, C204S426000, C204S429000, C204S431000
Reexamination Certificate
active
07367217
ABSTRACT:
A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, InN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.
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Babes-Dornea Elena
Fedison Jeffrey B.
Qin Renyan
Rose James W.
Sandvik Peter M.
Brueske Curtis B.
General Electric Company
Patnode Patrick K.
Shah Samir M.
Williams Hezron
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