US PATENT SUBCLASS 204 / 431
.~.~.~ Gas sensing electrode

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
400  DF  .~.~ Analysis and testing {20}
431.~.~.~ Gas sensing electrode {1}
432  DF  .~.~.~.~> With gas diffusion electrode

DEFINITION

Classification: 204/431

Gas sensing electrode:

(under subclass 400) Apparatus which detects the presence quantity or identity of a gas.

(1) Note. This subclass provides for trace gas detectors, detecting for example, oxygen, sulfur dioxide, carbon monoxide or hydrogen sulfide by means of a liquid electrolyte since solid electrolytes are provided for above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

421+, particularly 424 for a solid electrolyte electrode for gas analysis.