US PATENT SUBCLASS 585 / 867
.~.~.~ Hydrocarbon

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

800  DF  PURIFICATION, SEPARATION, OR RECOVERY {7}
833  DF  .~ By addition of extraneous agent, e.g., solvent, etc. {15}
864  DF  .~.~ Organic agent {3}
867.~.~.~ Hydrocarbon

DEFINITION

Classification: 585/867

Hydrocarbon:

(under subclass 864) Subject matter wherein an agent contains only carbon and hydrogen in its molecule.

SEE OR SEARCH THIS CLASS, SUBCLASS:

840, for a purification or separation process wherein a hydrocarbon is used to disengage a previously added agent from a hydrocarbon.