US PATENT SUBCLASS 423 / 308
.~.~.~.~ Orthophosphate (e.g., calcium hydroxyapatite)

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  DF  .~.~ Metal or ammonium containing {5}
307  DF  .~.~.~ Hydrogen containing {1}
308.~.~.~.~ Orthophosphate (e.g., calcium hydroxyapatite) {1}
309  DF  .~.~.~.~.~> Utilizing phosphoric acid or its anhydride as reactant {1}

DEFINITION

Classification: 423/308

(under subclass 307) Products or processes wherein the product contains the orthophosphate (PO4[end subscrpt][supscrpt]3-[end supscrpt]) radical.