US PATENT SUBCLASS 210 / 779-- .~.~ Discharging residue to prefilt

US PATENT SUBCLASS 210 / 779
.~.~ Discharging residue to prefilt

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

600	DF	PROCESSES {14}
767	DF	.~ Separating {16}
779		.~.~ Discharging residue to prefilt

DEFINITION

Classification: 210/779

Discharging residue to prefilt:

(under subclass 767) Process in which the separated solids or residue is returned to the influent or prefilt.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194+, for separatory apparatus with means to recirculate a constituent.

621+, and 629, for treatment by living organisms with recirculation to a prior step or internal recirculation.

712+, for precipitation processes with external recirculation.

765, for processes of chemical treatment with liquid recirculation.

805, for process with recirculation.