US PATENT SUBCLASS 203 / 68
.~.~ Hydrocarbon
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
DF
.~ Organic compound {8}
68
.~.~ Hydrocarbon {2}
69
DF
.~.~.~
> Aromatic
70
DF
.~.~.~
> Acyclic
DEFINITION
Classification: 203/68
(under subclass 57) Processes in which the compound is a hydrocarbon.
(1) Note. For purposes of this and indented subclasses the term "hydrocarbon" is limited to compounds consisting of carbon and hydrogen.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12+, for a process of separating only water in which a hydrocarbon is the azeotroping agent.
43+, for a process in which the extracting liquid is a hydrocarbon.
52, for a process of adding a mixture of hydrocarbons to assist separation during distillation.
SEE OR SEARCH CLASS
208, Mineral Oils: Processes and Products,
337, for a process of fraction- ating mineral oil using a hydrocarbon as a solvent.
585, Chemistry of Hydrocarbon Compounds, appropriate subclasses for compounds which consist of carbon and hydrogen only.
