US PATENT SUBCLASS 423 / 641
.~.~ Alkali metal (Li, Na, K, Rb, or Cs)

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

579  DF  OXYGEN OR COMPOUND THEREOF {4}
592  DF  .~ Metal containing {12}
641.~.~ Alkali metal (Li, Na, K, Rb, or Cs) {2}
642  DF  .~.~.~> By reacting sulfur containing compound
643  DF  .~.~.~> By reacting a nitrogenous or halogenous compound

DEFINITION

Classification: 423/641

(under subclass 592) Products or processes wherein the metal is lithium, sodium, potassium, rubidium or cesium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179+, for methods of obtaining alkali metal containing compounds wherein the starting starting materials are impure, i.e., mixtures.