US PATENT SUBCLASS 204 / 196.12
.~.~.~.~ With fluid filter

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
196.01  DF  .~.~ Object protection {15}
196.1  DF  .~.~.~ Internal battery {10}
196.12.~.~.~.~ With fluid filter

DEFINITION

Classification: 204/196.12

With fluid filter:

(under subclass 196.1) Apparatus having a foraminous or porous mass to trap one or more constituents while allowing remaining fluid to pass therethrough.

(1) Note. A fluid filter for this subclass may also be electrically charged (i.e., as an electrode) to preferentially attract one or more fluid constituents, provided that entrapment (e.g., physical removal, etc.) also occurs at the filter.