US PATENT SUBCLASS 423 / 420
.~.~.~ Ammonium containing

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

414  DF  CARBON OR COMPOUND THEREOF {3}
415.1  DF  .~ Oxygen containing {5}
419.1  DF  .~.~ Carbonate or bicarbonate {5}
420.~.~.~ Ammonium containing

DEFINITION

Classification: 423/420

(under subclass 419.1) Products or processes wherein the carbonate contains the ammonium (NH4[supscrpt]+[end supscrpt]) radical.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237, for a process of preparing ammonium carbonate from ammonia in waste gas, the carbonate being recovered as a by-product, where the main intent is to purify the gas.