US PATENT SUBCLASS 71 / 57
.~.~.~.~ Alkali metal or ammonium-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}
54  DF  .~.~ Nitrogen-containing (except ammonium) {2}
55  DF  .~.~.~ Cyanamide {2}
57.~.~.~.~ Alkali metal or ammonium-containing

DEFINITION

Classification: 71/57

(under subclass 55) Methods and products which include in addition to cyanamide, inorganic alkali metal or ammonium values.