US PATENT SUBCLASS 204 / 457
.~.~.~ With programmed, cylic, or time responsive control

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

*  DD  PROCESSES AND PRODUCTS {7}
450  DF  .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14}
456  DF  .~.~ Gel electrophoresis {8}
457.~.~.~ With programmed, cylic, or time responsive control {1}
458  DF  .~.~.~.~> Plural rapid changes in direction of electric field (at least 1,000 times total and at more than 1/sec) (e.g., pulsed field, etc.)

DEFINITION

Classification: 204/457

With programmed, cyclic, or time responsive control:

(under subclass 456) Process which involves (a) storing coded instructions or other data which are used to regulate the process, (b) repetitively regulating a sequence of process steps, or (c) regulating the process according to preset timing sequences (e.g., limiting various process steps to predetermined durations of time, etc.).

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

(2) Note. This subclass and the subclass indented hereunder is not intended to provide for the mere use of alternating current (AC), per se.