US PATENT SUBCLASS 210 / 798-- .~.~.~.~ Reverse flow

US PATENT SUBCLASS 210 / 798
.~.~.~.~ Reverse flow

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

600	DF	PROCESSES {14}
767	DF	.~ Separating {16}
791	DF	.~.~ Rehabilitating or regenerating filter medium {2}
797	DF	.~.~.~ By diverse fluid {1}
798		.~.~.~.~ Reverse flow

DEFINITION

Classification: 210/798

Reverse flow:

(under subclass 797) Process in which a cleaning fluid passes through the filter medium oppositely to the direction of flow during filtration.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601+, for analogous processes applied to a filter which contains bacterial growths.

777+, for processes including applying a precoat to a filter medium.

779, for processes including discharging the residue to the prefilt.

793+, for processes of rehabilitating a particulate material bed by reversal of flow.