US PATENT SUBCLASS 204 / 425
.~.~.~.~.~ With impressed current means

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}
421  DF  .~.~.~ Solid electrolyte {2}
424  DF  .~.~.~.~ Gas sample sensor {3}
425.~.~.~.~.~ With impressed current means

DEFINITION

Classification: 204/425

With impressed current means:

(under subclass 424) Apparatus in which a current is impressed on the sensor by means other than interaction with the sample or reference material.

(1) Note. The impressed current can be for the electrolytic generation of a reference gas.