US PATENT SUBCLASS 204 / 415
.~.~.~ Selectively permeable membrane


Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
400  DF  .~.~ Analysis and testing {20}
415.~.~.~ Selectively permeable membrane


DEFINITION

Classification: 204/415

Selectively permeable membrane:

(under subclass 400) Apparatus in which a constituent of the fluid being treated diffuses through a material which acts as a barrier to other constituents of the fluid permitting only the selected constituent to contract the electrode surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

416+, for electrodes which are themselves selective as to ionic species.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

644, for processes of use of selectively permeable membranes.