US PATENT SUBCLASS 205 / 742
.~ Water, sewage, or other waste water

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.~ Water, sewage, or other waste water {11}
743  DF  .~.~> With control responsive to sensed condition
744  DF  .~.~> With programmed, cyclic, or time responsive control
745  DF  .~.~> Internal battery action
746  DF  .~.~> Using membrane {3}
751  DF  .~.~> With filtering {1}
753  DF  .~.~> Using particle bed {1}
755  DF  .~.~> With mixing, agitating, or gas-liquid contacting {2}
758  DF  .~.~> Using porous electrode (e.g., perforated, etc.)
759  DF  .~.~> Using coated electrode (e.g., having electrocatalytic coating, etc.)
760  DF  .~.~> Using electrode containing precious metal or free carbon (e.g, insoluble electrode, etc.)
761  DF  .~.~> Using electrode containing ferrous metal

DEFINITION

Classification: 205/742

Water, sewage, or other waste water:

(under subclass 687) Subject matter in which the material treated is water, sewage, or any other waste water.

(1) Note. This subclass and the subclasses indented hereunder are intended to provide for purification or other treatment of water or waste water as the desired product. Electrolytic treatment of water, sewage, or other waste water to obtain other products are classified elsewhere in this class, depending on the particular process and type of material produced, and are cross-referenced here when necessary.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy,

450+, for electrophoretic or electro-osmotic separation or purification of aqueous liquids and subclasses 554+ for other electrical separation or purification of aqueous liquids.

210, Liquid Purification or Separation, especially

748, for nonelectrolytic purification or separation of a liquid utilizing the direct application of electrical or wave energy; see Class 204, (14) Note, for the class line.