US PATENT SUBCLASS 210 / 500.23
.~.~.~ Hollow fiber or cylinder

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

348  DF  FILTER {25}
500.1  DF  .~ Material {6}
500.21  DF  .~.~ Semipermeable membrane {6}
500.23.~.~.~ Hollow fiber or cylinder

DEFINITION

Classification: 210/500.23

Hollow fiber or cylinder:

(under subclass 500.21) Subject matter in the shape of either an annulus or of a cylindrical hollow structure which is relatively elongated compared with its diameter.

(1) Note. Such a structure maybe described as, e.g., a tube, a capillary, or a hollow fiber.