US PATENT SUBCLASS 210 / 640
.~.~ Passing through membrane in vapor phase

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
634  DF  .~ Liquid/liquid solvent or colloidal extraction or diffusing or passing through septum selective as to material of a component of liquid; such diffusing or passing being effected by other than only an ion exchange or sorption process {11}
640.~.~ Passing through membrane in vapor phase

DEFINITION

Classification: 210/640

Passing through membrane in vapor phase:

(under subclass 634) Process in which a constituent of the liquid diffuses through a septum and exists in the gaseous state.

SEE OR SEARCH CLASS

95, Gas Separation: Processes,

46, for degasification of a liquid by selective diffusion of gases through a substantially solid barrier, in which the constituent that is removed is initially present as a gas in the liquid. Class 210 takes processes of separating a constituent through a membrane or septum wherein the constituent is not initially present as a gas in the liquid and passes through the membrane or septum in vapor phase.

203, Distillation: Processes, Separatory, for a process in which a constituent of a liquid is vaporized and condensed to separate it from the liquid mixture. If the phase change occurs during diffusion through a septum, the process is classifiable here.