US PATENT SUBCLASS 204 / 435
.~.~.~ Standard reference 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}
435.~.~.~ Standard reference electrode

DEFINITION

Classification: 204/435

Standard reference electrode:

(under subclass 400) Apparatus including means for producing a precise and reproducible reference potential.

(1) Note. As no attempt has been made to cross-reference all apparatus in which a reference cell is present, if such a cell is claimed in combination with features provided for in a preceding subclass a search of that subclass is generally indicated.