US PATENT SUBCLASS 71 / 56
.~.~.~.~ Nitrogen-containing (except ammonium)

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

1  DF  PROCESSES AND PRODUCTS {5}
31  DF  .~ Inorganic material {5}
54  DF  .~.~ Nitrogen-containing (except ammonium) {2}
55  DF  .~.~.~ Cyanamide {2}
56.~.~.~.~ Nitrogen-containing (except ammonium)

DEFINITION

Classification: 71/56

(under subclass 55) Methods and products which include in addition to cyanamide another inorganic N value (except NH4 values only), such as nitrates.