USPC Class Details

Description: 71 chemistry: fertilizers / 71 chemistry: fertilizers/(1) processes and products (31) inorganic material (54) nitrogen-containing (except ammonium) (55) cyanamide (56) nitrogen-containing (except ammonium)

Hierarchy/Derived subclasses

71 / 1-> 31-> 54-> 55-> 56

uspto searches

Patent Apps in 71/56

Granted Patents in 71/56

Use the links above or do an advanced search in ppubs for:
(71/56.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.
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