US PATENT SUBCLASS 202 / 153-- .~.~.~ Still and column

US PATENT SUBCLASS 202 / 153
.~.~.~ Still and column

Current as of: June, 1999
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202 /	HD	DISTILLATION: APPARATUS

81	DF	APPARATUS {4}
82	DF	.~ Systems {6}
152	DF	.~.~ Separatory {3}
153		.~.~.~ Still and column {2}
154	DF	.~.~.~.~> Plural columns
155	DF	.~.~.~.~> Plural stills {1}

DEFINITION

Classification: 202/153

Associations of still and fractionating column, either as separate or integral structures.

(1) Note. A still is defined for purposes of this class as a vessel having a tube leading therefrom for the purpose of carrying vapors generated within it to a condenser or a vessel adapted and designed and used in connection with a condenser, which latter is not necessarily shown or claimed. The vessel is to be heated only to a temperature below that which would produce chemical change in the distilland. For definition of "column" see subclass 158 below.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

100, for a mineral oil distilling system including a fractionating column and subclass 139, for a condensing apparatus including a fractionating column.