USPC Class Details

Description: 71 chemistry: fertilizers / 71 chemistry: fertilizers/(1) processes and products (31) inorganic material (32) phosphorus-containing (33) phosphates

Hierarchy/Derived subclasses

71 / 1-> 31-> 32-> 33-> 34-> 35
     -> 36
    -> 37-> 38
     -> 39
     -> 40
     -> 41
    -> 42
    -> 43
    -> 44-> 45
     -> 46
     -> 47
    -> 48-> 49-> 50
     -> 51
     -> 52
     -> 53

uspto searches

Patent Apps in 71/33

Granted Patents in 71/33

Advanced search in patft or appft for the hierarchy would be:
(ccl/71/33 or ccl/71/34 or ccl/71/35 or ccl/71/36 or ccl/71/37 or ccl/71/38 or ccl/71/39 or ccl/71/40 or ccl/71/41 or ccl/71/42 or ccl/71/43 or ccl/71/44 or ccl/71/45 or ccl/71/46 or ccl/71/47 or ccl/71/48 or ccl/71/49 or ccl/71/50 or ccl/71/51 or ccl/71/52 or ccl/71/53)

Press the Search button below to send the query to the USPTO site. (Granted patents search)




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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