US PATENT SUBCLASS 71 / 49
.~.~.~.~.~ Nitrogen-containing

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}
48  DF  .~.~.~.~ Products {4}
49.~.~.~.~.~ Nitrogen-containing {1}
50  DF  .~.~.~.~.~.~> Nitrates

DEFINITION

Classification: 71/49

(under subclass 48) Products which contain also inorganic N values, other than or in addition to NH4.

SEE OR SEARCH THIS CLASS, SUBCLASS:

51, for products wherein the only inorganic N value is NH4.