US PATENT SUBCLASS 210 / 321.76
.~.~.~ 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}
321.72  DF  .~ Each section having inlet(s) and outlet(s) {5}
321.75  DF  .~.~ Planar membrane {1}
321.76.~.~.~ Spiral flow

DEFINITION

Classification: 210/321.76

Spiral flow:

(under subclass 321.75) 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).