US PATENT SUBCLASS 585 / 862
.~.~.~ Carbonyl moiety-containing

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}
860  DF  .~.~ N-containing {3}
862.~.~.~ Carbonyl moiety-containing

DEFINITION

Classification: 585/862

Carbonyl moiety-containing:

(under subclass 860) Subject matter wherein an agent contains the =C=O functional grouping, e.g., and acid, an aldehyde, a ketone, etc.

SEE OR SEARCH CLASS

260, Chemistry of Carbon Compounds,

96.5, for the formation of a urea adduct, even when the formation of such adduct is merely for the purpose of

purifying a hydrocarbon.