US PATENT SUBCLASS 204 / 561
.~.~.~.~ With addition of agent to facilitate removal

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}
560  DF  .~.~.~ Removing solids {2}
561.~.~.~.~ With addition of agent to facilitate removal

DEFINITION

Classification: 204/561

With addition of agent to facilitate removal:

(under subclass 560) Process in which a material is added to the liquid under treatment to clearly aid removal of solids therefrom.

(1) Note. The addition of an agent for this subclass is more restricted than the mere use of a modifying agent in resolving an emulsion or dispersion as provided for in subclasses 567+.