US PATENT SUBCLASS 585 / 853
.~.~ Alkaline metal-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}
853.~.~ Alkaline metal-containing {1}
854  DF  .~.~.~> Elemental metal, oxide, or hydroxide

DEFINITION

Classification: 585/853

Alkaline metal-containing:

(under subclass 833) Subject matter wherein an extraneous agent contains lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, or barium or a compound thereof.