US PATENT SUBCLASS 205 / 746
.~.~ Using membrane

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

687  DF  ELECTROLYTIC MATERIAL TREATMENT (PRODUCT, PROCESS, AND ELECTROLYTE COMPOSITION) {8}
742  DF  .~ Water, sewage, or other waste water {11}
746.~.~ Using membrane {3}
747  DF  .~.~.~> With filtering
748  DF  .~.~.~> Plural membranes {1}
750  DF  .~.~.~> Removing metal

DEFINITION

Classification: 205/746

Using membrane:

(under subclass 742) Subject matter in which a semipermeable solid barrier or diaphragm (e.g., ion exchange membrane, etc.) is used in the treatment of water, sewage, or other waste water; usually the barrier or diaphragm is placed between the electrodes in an electrolytic cell to provide separate compartments.

SEE OR SEARCH THIS CLASS, SUBCLASS:

703, for electrolytic treatment of organic material using a membrane.

770, for electrolytic treatment of other nonmetallic inorganic material using a membrane.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy,

450+, particularly subclasses 518+ for electrophoretic or electro-osmotic barrier separation.