US PATENT SUBCLASS 436 / 32
.~.~.~ Analyzing evolved gas

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

25  DF  GEOCHEMICAL, GEOLOGICAL, OR GEOTHERMAL EXPLORATION {4}
29  DF  .~ For petroleum oils or carbonaceous minerals {2}
31  DF  .~.~ Removing and testing solid samples {1}
32.~.~.~ Analyzing evolved gas {1}
33  DF  .~.~.~.~> Evolving gas by acidification

DEFINITION

Classification: 436/32

Analyzing evolved gas:

(under subclass 31) Processes or compositions where solid samples are chemically treated to evolve a gas and the gas is chemically analyzed.

(1) Note. The evolution of gas need not be chemical evolution but includes physical treatment to release dissolved or otherwise trapped gas from a sample material.

(2) Note. Typically the gases evolved include carbon dioxide.

(3) Note. The test for the gas absent the evolution step would be found in subclasses below.

(4) Note. The evolved gas is sometimes condensed and the condensate is analyzed.