US PATENT SUBCLASS 71 / 46
.~.~.~.~.~ Alkali metal values


Current as of: June, 1999
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71 /   HD   CHEMISTRY: FERTILIZERS

1  DF  PROCESSES AND PRODUCTS {5}
31  DF  .~ Inorganic material {5}
32  DF  .~.~ Phosphorus-containing {1}
33  DF  .~.~.~ Phosphates {6}
44  DF  .~.~.~.~ Heat-treatment {3}
46.~.~.~.~.~ Alkali metal values


DEFINITION

Classification: 71/46

(under subclass 45) Processes wherein Si values are not present.