US PATENT SUBCLASS 204 / 400
.~.~ Analysis and testing

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
400.~.~ Analysis and testing {20}
401  DF  .~.~.~> Fault testing of sensor or component
402  DF  .~.~.~> Regeneration or activation
403  DF  .~.~.~> Biological, e.g., microbe, enzyme, antigen, etc.
404  DF  .~.~.~> Corrosion
405  DF  .~.~.~> Titration
406  DF  .~.~.~> With significant electrical circuitry or nominal computer device
407  DF  .~.~.~> With significant display or analytical device
408  DF  .~.~.~> With means for temperature or pressure compensation
409  DF  .~.~.~> With means providing specified-flow condition or flow-path {2}
412  DF  .~.~.~> Three or more electrodes
413  DF  .~.~.~> Liquid electrode, e.g., Hg, Na, etc.
414  DF  .~.~.~> Gel electrolyte
415  DF  .~.~.~> Selectively permeable membrane
416  DF  .~.~.~> Ion-sensitive electrode {3}
421  DF  .~.~.~> Solid electrolyte {2}
430  DF  .~.~.~> Moisture absorbing electrolyte
431  DF  .~.~.~> Gas sensing electrode {1}
433  DF  .~.~.~> Measuring carbon or pH
434  DF  .~.~.~> Involving plating, coating or stripping
435  DF  .~.~.~> Standard reference electrode

DEFINITION

Classification: 204/400

Analysis and testing:

(under subclass 194) Apparatus for utilizing electrolytic action for analysis or testing where the testing device is

claimed, per se.

(1) Note. Combinations of electrochemical testing devices with the systems in which they may be employed will be placed with the combination class and cross-referenced here, if necessary.

(2) Note. This and the indented subclasses include reference or testing electrodes, cells or half cells, either, per se, or in nominal combination with a broadly recited test circuit.

SEE OR SEARCH CLASS

252, Compositions,

62.2, for the composition of electrolytes for electrical condensers and recitifiers, some of which electrolytes are useful for analysis and testing.

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), 414+, for such devices used as sensors (e.g., chemical sensors).

324, Electricity: Measuring and Testing,

323+, for the testing of underground formations by electrolytic methods as, for example, the testing of an oil well bore for water strata, and subclasses 425+ for the subject matter of this subclass in combination with significant electrical testing circuits.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

50+, for analytical chemical apparatus including means for carrying out nonelectrochemical analysis and for apparatus for carrying out a combined chemical and electrochemical procedure.