US PATENT SUBCLASS 204 / 539
.~.~.~.~ Using anion selective membrane

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

*  DD  PROCESSES AND PRODUCTS {7}
450  DF  .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14}
518  DF  .~.~ Barrier separation (e.g., using membrane, filter paper, etc.) {5}
520  DF  .~.~.~ Ion selective {8}
539.~.~.~.~ Using anion selective membrane

DEFINITION

Classification: 204/539

Using anion selective membrane:

(under subclass 520) Process in which at least one anion selective membrane is used.