US PATENT SUBCLASS 203 / 11
.~ Under pressure or vacuum

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

10  DF  WATER PURIFICATION ONLY {1}
11.~ Under pressure or vacuum

DEFINITION

Classification: 203/11

(under subclass 10) Processes in which distillation is carried out under a pressure greater than atmospheric or under a vacuum.

SEE OR SEARCH THIS CLASS, SUBCLASS:

73+, for a plural distillation process in which at least one distillation is under pressure or vacuum and subclasses 91+ for a single distillation process carried out under pressure or vacuum.