US PATENT SUBCLASS 210 / 353
.~ Free cleaning means, e.g., loose abrading particles

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

348  DF  FILTER {25}
353.~ Free cleaning means, e.g., loose abrading particles

DEFINITION

Classification: 210/353

(under subclass 348) Apparatus in which there is a cleaning means, as loose abrading particles or wiping elements, which are free to move, (not attached to a retaining means).

SEE OR SEARCH THIS CLASS, SUBCLASS:

263+, for a filter having loose material acting as a filter medium.