US PATENT SUBCLASS 204 / 663
.~.~ With programmed, cyclic, or time responsive control means

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

193  DF  APPARATUS {5}
660  DF  .~ Apparatus for electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation) {10}
663.~.~ With programmed, cyclic, or time responsive control means

DEFINITION

Classification: 204/663

With programmed, cyclic, or time responsive control means:

(under subclass 660) Apparatus which is provided with control means for (a) storing coded instructions or other data which are used to regulate operation of the treating apparatus, (b) repetitively regulating a sequence of operational steps performed in or by the treating apparatus, or (c) causing various system operations to occur according to preset timing sequences or to last for predetermined durations of time (e.g., timer switches, etc.).

(1) Note. This subclass includes any control means which maintains an operating condition, predetermines apparatus operation, or regulates repetition.

(2) Note. This subclass is not intended to provide for apparatus merely using alternating current (AC), per se.