US PATENT SUBCLASS 423 / 500
.~ Elemental halogen

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

462  DF  HALOGEN OR COMPOUND THEREOF {10}
500.~ Elemental halogen {6}
501  DF  .~.~> Ion exchanging or liquid-liquid extracting
502  DF  .~.~> Oxidizing catalytically
503  DF  .~.~> Sorbing
504  DF  .~.~> From mixture containing alkali metal or alkaline earth metal {1}
506  DF  .~.~> By reacting alkali metal halide with sulfur compound
507  DF  .~.~> By reacting hydrogen halide or ammonium halide

DEFINITION

Classification: 423/500

(under subclass 462) Products or processes wherein the product is a halogen in elemental form.

SEE OR SEARCH THIS CLASS, SUBCLASS:

249, for astatine (Atomic No. 85), which is the radioactive member of the halogen family, or a compound thereof.