US PATENT SUBCLASS 436 / 29
.~ For petroleum oils or carbonaceous minerals

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.~ For petroleum oils or carbonaceous minerals {2}
30  DF  .~.~> Removing and testing drilling mud or fluid
31  DF  .~.~> Removing and testing solid samples {1}

DEFINITION

Classification: 436/29

For petroleum oils or carbonaceous minerals:

(under subclass 25) Processes of compositions wherein oil gas or carbonaceous materials are sought.

(1) Note. Included in this subclass are processes in which an adsorbent is placed within a bore hole and gas evolved is collected and then exhausted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

139, for a test for hydrocarbons including methane.

SEE OR SEARCH CLASS

73, Measuring and Testing,

19.01+, for the detection of a hydrocarbon gas in seawater; subclasses 23.2+ for a prospecting method for hydrocarbons, subclasses 61.43+ for detection of oil or hydrocarbons in water, and subclasses 152.01+ for a borehole test which is not purely electrical or purely magnetic.