US PATENT SUBCLASS 204 / 630
.~.~.~ Ion selective

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

193  DF  APPARATUS {5}
600  DF  .~ Electrophoretic or electro-osmotic apparatus {11}
627  DF  .~.~ Barrier separator (e.g., electrodialyzer, etc.) {5}
630.~.~.~ Ion selective {5}
631  DF  .~.~.~.~> With bipolar membrane
632  DF  .~.~.~.~> And ion exchange material (e.g., suspended ion exchange resin particles, etc.)
633  DF  .~.~.~.~> Both anion and cation selective membranes {1}
637  DF  .~.~.~.~> And nonion selective membrane
638  DF  .~.~.~.~> With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

DEFINITION

Classification: 204/630

Ion selective:

(under subclass 627) Apparatus in which the barrier distinguishes between ions of different charges to effect separation.

(1) Note. Barrier separators which distinguish between ions having different levels of positive or negative charge are included here as well as those distinguishing between positive and negative charge.

(2) Note. The ion selective barrier may be a permiselective or ion exchange membrane.