|Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP|
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|Class 71||CHEMISTRY: FERTILIZERS|
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|1||PROCESSES AND PRODUCTS|
|12||From sewage or night soil|
|15||From animal matter|
|18||Horn, hair, feathers, wool, leather, etc.|
|21||Guano, stable manure, etc.|
|22||With other organic material|
|25||From industrial wastes|
|27||From synthetic material|
|34||Alkali metal and ammonium only|
|45||Alkali metal and silicon values|
|46||Alkali metal values|
|47||Carbonates, oxides, sulfates, silicon, and halides|
|54||Nitrogen-containing (except ammonium)|
|61||Alkali metal or ammonium|
|63||Carbonates, oxides, sulfates, halides, etc.|
|64.01||Forms or conditioning|
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|FOR000||CLASS-RELATED FOREIGN DOCUMENTS|
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