US PATENT SUBCLASS 196 / 100-- .~.~ Columns

US PATENT SUBCLASS 196 / 100
.~.~ Columns

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999 Terms of Use

196 /	HD	MINERAL OILS: APPARATUS

98	DF	COMBINED VAPORIZING AND CONDENSING {3}
99	DF	.~ Condensate returned to vaporizer {1}
100		.~.~ Columns

DEFINITION

Classification: 196/100

(under subclass 99) Fractionating columns provided with heating means for causing vaporization of the liquid-mineral-oil- feeding stock.

SEE OR SEARCH THIS CLASS, SUBCLASS:

139, for columns which are heated merely by hot vapors that are treated and which are generated in a separate vaporizer.

SEE OR SEARCH CLASS

202, Distillation: Apparatus, appropriate subclasses, particularly

153, for separatory distillation apparatus including association of still and fractionating column. 260, Chemistry of Carbon Compounds, appropriate subclasses.