US PATENT SUBCLASS 210 / 797-- .~.~.~ By diverse fluid

US PATENT SUBCLASS 210 / 797
.~.~.~ By diverse fluid

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		.~.~.~ By diverse fluid {1}
798	DF	.~.~.~.~> Reverse flow

DEFINITION

Classification: 210/797

By diverse fluid:

(under subclass 791) Process of cleaning the filter medium by contact with a fluid other than the prefilt.

(1) Note. For purposes of this subclass, the effluent from the filtration step is not considered to be a diverse fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

792+, for processes involving the rehabilitation of loose

particulate material type of filter bed.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers, especially

137+, for processes of cleaning textile filter cloths independently of the filtering operation.