US PATENT SUBCLASS 585 / 860
.~.~ N-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.~.~ N-containing {3}
861  DF  .~.~.~> Ammonia
862  DF  .~.~.~> Carbonyl moiety-containing
863  DF  .~.~.~> Interaction with aromatic

DEFINITION

Classification: 585/860

N-containing:

(under subclass 833) Subject matter wherein an agent contains nitrogen.