US PATENT SUBCLASS 210 / 704
.~.~.~ Including chemical addition (with or without bouyancy gas)

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
702  DF  .~ Making an insoluble substance or accreting suspended constituents {14}
703  DF  .~.~ Effecting flotation {1}
704.~.~.~ Including chemical addition (with or without bouyancy gas) {1}
705  DF  .~.~.~.~> Chemically specified precipitant, coagulant, or flocculant {1}

DEFINITION

Classification: 210/704

Including chemical addition (with or without bouyancy gas):

(under subclass 703) Process which includes the step of adding a material which serves to insolubilize or accrete a constituent or effect a chemical change in the liquid and which is in addition to any bouyancy gas which may be used.

(1) Note. For purposes of this subclass, a gas used merely to float the substance is not considered to be a chemical and would ordinarily be classified in subclass 703.