US PATENT SUBCLASS 203 / 57
.~ Organic compound

Current as of: June, 1999
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203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

50  DF  ADDING MATERIAL TO DISTILLAND EXCEPT WATER OR STEAM PER SE {2}
57.~ Organic compound {8}
58  DF  .~.~> Heterocyclic
59  DF  .~.~> Amine
60  DF  .~.~> Ester
61  DF  .~.~> Acid
62  DF  .~.~> Aldehyde or ketone
63  DF  .~.~> Alcohol or ether {3}
67  DF  .~.~> Halogenated hydrocarbon
68  DF  .~.~> Hydrocarbon {2}

DEFINITION

Classification: 203/57

(under subclass 50) Processes in which the additional material is an organic compound.

(1) Note. See Class 260, Chemistry of Carbon Compounds, Class Definitions, Definitions of Terms Employed In This Class, and appropriate subclasses for definitions of terms used in this and indented subclasses.

SEE OR SEARCH CLASS

260, Chemistry of Carbon Compounds, appropriate subclass for a particular nonhydrocarbon organic compound.

585, Chemistry of Hydrocarbon Compounds,

16+, for a hydrocarbon compound per se, and subclasses 864+ for hydrocarbon purification involving use of an organic agent.