USPC Class Details

Description: 71 chemistry: fertilizers / 71 chemistry: fertilizers/(1) processes and products (31) inorganic material (32) phosphorus-containing (33) phosphates (34) alkali metal and ammonium only (35) nitrogen-containing

Hierarchy/Derived subclasses

71 / 1-> 31-> 32-> 33-> 34-> 35

uspto searches

Patent Apps in 71/35

Granted Patents in 71/35

Use the links above or do an advanced search in ppubs for:
(71/35.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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