US PATENT SUBCLASS 208 / 186
.~.~.~ With solid-liquid separation


Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

177  DF  REFINING {23}
179  DF  .~ Purifying used oil {3}
184  DF  .~.~ Distillation or degassing {2}
186.~.~.~ With solid-liquid separation


DEFINITION

Classification: 208/186

(under subclass 184) Processes which include a specifically defined separation of liquid from solid material.

(1) Note. Solid-liquid separation steps recited by name only are not included herein. Many of the processes classified in this subclass are directed to the separation of solid treating agents from the treated oil.

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. Combinations of emulsion breaking and a treatment of the mineral oil provided for in Class 208 are classified in Class 208.