US PATENT SUBCLASS 585 / 861
.~.~.~ Ammonia


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}
861.~.~.~ Ammonia


DEFINITION

Classification: 585/861

Ammonia:

(under subclass 860) Subject matter wherein an agent is NH3 or NH4[end subscrpt]OH.