US PATENT SUBCLASS 204 / 560
.~.~.~ Removing solids

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

*  DD  PROCESSES AND PRODUCTS {7}
554  DF  .~ Electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation) {7}
559  DF  .~.~ Predominantly hydrocarbon {2}
560.~.~.~ Removing solids {2}
561  DF  .~.~.~.~> With addition of agent to facilitate removal
562  DF  .~.~.~.~> Using cohesive filter or solid packing

DEFINITION

Classification: 204/560

Removing solids:

(under subclass 559) Process in which solid material is removed from the liquid under treatment.

(1) Note. Very small single cell biological entities (e.g., bacteria, etc.) are not considered to be solid material for the purposes of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

571+, for electrical separation or purification to remove solids from other liquids.