US PATENT SUBCLASS 423 / 321.1
.~.~.~.~ Purification or recovery

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}
316  DF  .~.~ Ternary compound containing hydrogen {1}
317  DF  .~.~.~ Orthophosphoric acid {3}
321.1.~.~.~.~ Purification or recovery {1}
321.2  DF  .~.~.~.~.~> Organic solvent extraction

DEFINITION

Classification: 423/321.1

Purification or recovery:

(under subclass 317) Process wherein the product is separated from impurities or undesired foreign matter.