US PATENT SUBCLASS 210 / 321.85
.~.~ Spiral flow

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

321.6  DF  CASING DIVIDED BY MEMBRANE INTO SECTIONS HAVING INLET(S) AND/OR OUTLET(S) {15}
321.84  DF  .~ Planar membrane {1}
321.85.~.~ Spiral flow

DEFINITION

Classification: 210/321.85

Spiral flow:

(under subclass 321.84) Apparatus including means providing spiral liquid flow (moving essentially in a plane around a center with increasing or decreasing distance from said center adjacent a membrane(s).