US PATENT SUBCLASS 436 / 139
HYDROCARBON

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

139HYDROCARBON {3}
140  DF  .~> Aromatic
141  DF  .~> Acyclic (e.g., methane, octane, isoparaffin, etc.) {1}
143  DF  .~> Total hydrocarbon, flammability, combustibility (e.g., air-fuel mixture, etc.)

DEFINITION

Classification: 436/139

HYDROCARBON:

(under the class definition) Subject matter in which there is a qualitative or quantitative chemical analysis of compounds which consist of carbon and hydrogen only.

(1) Note. Coal has arbitrarily been classified as a hydrocarbon.

(2) Note. A claim broadly reciting "organic compound" with a shotgun disclosure is originally classified on the basis of analysis technique in subclasses 147 through 181 and desirably cross-referenced to this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

62, for determination of BOD, COD or TOD which may include the detection of hydrocarbons.

SEE OR SEARCH CLASS

73, Measuring and Testing, 19.01+, for the detection of 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 subclass 152.01 for bore hole and drilling study.

205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,

775+, for electrolytic analysis or testing processes, especially subclass 787 for electrolytic determination of an organic compound.

250, Radiant Energy,

301, for methods involving radiant energy for determination of oil presence, contamination or concentration.