US PATENT SUBCLASS 73 / 23.35
.~ Gas chromatography

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

23.2  DF  GAS ANALYSIS {15}
23.35.~ Gas chromatography {7}
23.36  DF  .~.~> With electrical computer or data processor control
23.37  DF  .~.~> With spectrometer
23.38  DF  .~.~> Petrochemical
23.39  DF  .~.~> Column detail
23.4  DF  .~.~> Detector detail
23.41  DF  .~.~> Including sample preparation or sampling
23.42  DF  .~.~> Detail of gas handling means

DEFINITION

Classification: 73/23.35

Gas chromatography:

(under subclass 23.2) Process or apparatus in which the effluent of a mixture of gases, which has contacted a solvent or sorbent which separates the mixture into fractional components, is successively tested to determine the quantity, quality or identity of a component of the effluent.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19.02, for a gas chromatography process or apparatus for determining the presence of, or the amount of, gas in a liquid or a solid.

35.05+, for a gas detector, per se, which may be used in gas chromatography.

53.01+, for liquid testing (e.g., liquid chromatography).

863+, for a sampling device, per se.

SEE OR SEARCH CLASS

95, Gas Separation: Processes, 82+, for processes of gas separation, per se (i.e., not combined with analysis steps), using chromatography.

96, Gas Separation: Apparatus,

101+, for apparatus for gas separation, per se (i.e., not combined with analysis means), of the chromatos:graphic type.

204, Chemistry: Electrical and Wave Energy,

400+, for electrochemical gas sensors, per se.

210, Liquid Purification or Separation,

660+, for a process of removing a constituent from a liquid by sorption, particularly subclasses 656+ for selective sorptions (e.g., chromatography), subclasses 85+ for a liquid separator with recorder or register and subclasses 263+ for a liquid separator utilizing a bed of particulate material.

324, Electricity: Measuring and Testing, particularly

464+, for gas analysis using ionization effects, and appropriate subclasses for testing gas by measuring impedance, admittance, and related quantities.

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

50+, for an apparatus utilizing a chemical reaction to analyze a gas, particularly subclass 89 for gas chromatography. 436, Chemistry: Analytical and Immunological Testing, for a process of gas analysis which utilizes a chemical reaction, particularly

161+, for chromatography.