US PATENT SUBCLASS 210 / 321.73
.~.~ Noncoiled nonannular cross section tube

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}
321.73.~.~ Noncoiled nonannular cross section tube

DEFINITION

Classification: 210/321.73

Noncoiled nonannular cross section tube:

(under subclass 321.72) Apparatus wherein at least on e membrane is, (a) generally tubular, (b) noncylindrical in defining a cross section (said cross section being taken perpendicularly to the central axis of the tube) which is nonannular (e.g., inner and/or outer surface(s) define noncircular cross section), and (c) not coiled.

(1) Note. A coiled flatted membrane tube is provided for in subclasses 321.74 and 321.83.