US PATENT SUBCLASS 585 / 805
.~.~.~ Xylene or ethylbenzene

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

800  DF  PURIFICATION, SEPARATION, OR RECOVERY {7}
802  DF  .~ By plural serial diverse separations {3}
804  DF  .~.~ To recover aromatic {3}
805.~.~.~ Xylene or ethylbenzene

DEFINITION

Classification: 585/805

Xylene or ethylbenzene:

(under subclass 804) Subject matter wherein the hydrocarbon is one or more xylene isomer(s).