US PATENT SUBCLASS 204 / 565
.~.~.~.~ Using modified alternating current (other than standard 50 Hz or 60 Hz sine wave) field

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

*  DD  PROCESSES AND PRODUCTS {7}
554  DF  .~ Electrical (including simultaneous electrical and magnetic) separation or purification of liquid or magnetic treatment of liquid (other than separation) {7}
559  DF  .~.~ Predominantly hydrocarbon {2}
563  DF  .~.~.~ Resolving emulsion or dispersion {3}
565.~.~.~.~ Using modified alternating current (other than standard 50 Hz or 60 Hz sine wave) field

DEFINITION

Classification: 204/565

Using modified alternating current (other than standard 50 Hz

or 60 Hz sine wave) field:

(under subclass 564) Process in which the emulsion or dispersion is resolved using an electric field produced by a modified alternating current with a frequency or wave form other than that of standard 50 Hz or 60 Hz sine wave alternating current (e.g., other than standard pure or simple alternating current, etc.).

(1) Note. A modified alternating current field is often used to reduce short circuiting by inhibiting the alignment of conducting constituents in the emulsion or dispersion between opposing electrodes.

SEE OR SEARCH CLASS

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

113+, for compositions for or subcombination compositions for or breaking of or inhibiting of colloid systems (e.g., foam breaking, emulsion breaking, dispersion inhibiting, suspension settling, gel breaking, smoke suppressing, coagulating, flocculating), when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art, when without using electrical or wave energy.