US PATENT SUBCLASS 585 / 866
.~.~.~ Acid, anhydride, ester or ether

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}
866.~.~.~ Acid, anhydride, ester or ether

DEFINITION

Classification: 585/866

Acid, anhydride, ester or ether:

(under subclass 864) Subject matter wherein an agent contains

the grouping -C--C- or -C-O-.