US PATENT SUBCLASS 204 / 636
.~.~.~.~.~.~ With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
600  DF  .~ Electrophoretic or electro-osmotic apparatus {11}
627  DF  .~.~ Barrier separator (e.g., electrodialyzer, etc.) {5}
630  DF  .~.~.~ Ion selective {5}
633  DF  .~.~.~.~ Both anion and cation selective membranes {1}
634  DF  .~.~.~.~.~ Alternating anion and cation selective membranes {2}
636.~.~.~.~.~.~ With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.)

DEFINITION

Classification: 204/636

With foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.):

(under subclass 634) Apparatus having a foraminous or perforated membrane support or spacer (e.g., screen, perforated plate, fabric, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

638, for an ion selective barrier separator with a foraminous or perforated membrane support or spacer but without both anion and cation selective membranes.

639, for a nonion selective barrier separator with a foraminous or perforated membrane support spacer.