US PATENT SUBCLASS 71 / 55
.~.~.~ Cyanamide

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.~.~.~ Cyanamide {2}
56  DF  .~.~.~.~> Nitrogen-containing (except ammonium)
57  DF  .~.~.~.~> Alkali metal or ammonium-containing

DEFINITION

Classification: 71/55

(under subclass 54) Methods and products in which the N value is a cyanamide or a derivative thereof.