US PATENT SUBCLASS 423 / 305
.~.~ Metal or ammonium containing

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

299  DF  PHOSPHORUS OR COMPOUND THEREOF {5}
304  DF  .~ Oxygen containing {2}
305.~.~ Metal or ammonium containing {5}
306  DF  .~.~.~> Plural metal or metal and ammonium containing
307  DF  .~.~.~> Hydrogen containing {1}
311  DF  .~.~.~> Orthophosphate {1}
314  DF  .~.~.~> Metaphosphate
315  DF  .~.~.~> Triphosphate or tetraphosphate

DEFINITION

Classification: 423/305

(under subclass 304) Products or processes wherein the product also contains a metal or the ammonium (NH4[supscrpt]+[end supscrpt]) radical.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237+, for a process of preparing ammonium phosphate from the ammonia in gas where the mains intent is to purify the gas, the recovery of the product being of secondary importance.