US PATENT SUBCLASS 204 / 480
.~.~.~ With regeneration or replenishment of coating bath (e.g., ultrafiltration, ion exchange, measurement followed by addition of concentrated reagent, etc.)

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}
471  DF  .~.~ Coating or forming of object {13}
480.~.~.~ With regeneration or replenishment of coating bath (e.g., ultrafiltration, ion exchange, measurement followed by addition of concentrated reagent, etc.) {2}
481  DF  .~.~.~.~> Using ion exchange material
482  DF  .~.~.~.~> Using filter or membrane

DEFINITION

Classification: 204/480

With regeneration or replenishment of coating bath (e.g., ultrafiltration, ion exchange, measurement followed by addition of concentrated reagent, etc.):

(under subclass 471) Process which includes purification or rejuvenation (e.g., using ultrafiltration, ion exchange, etc.) or concentration adjustment of the coating bath (e.g., measurement followed by addition of concentrated reagent, etc.).

(1) Note. The type of measurement followed by replenishment for concentration adjustment which is provided for in this subclass and the subclasses indented hereunder does not include any adjustment which is controlled in direct response to a sensed condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

472+, for electrophoretic coating or forming of an object with control that is responsive to a sensed condition.