US PATENT SUBCLASS 204 / 568
.~.~.~.~.~ Gas or vapor

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}
567  DF  .~.~.~.~ Using modifying agent {3}
568.~.~.~.~.~ Gas or vapor

DEFINITION

Classification: 204/568

Gas or vapor:

(under subclass 567) Process in which the modifying agent is a gas or vapor.

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.