USPC Class Details

Description: 71 chemistry: fertilizers / 71 chemistry: fertilizers/(1) processes and products (11) organic material-containing (27) from synthetic material (28) urea and its derivatives (29) with phosphorus-containing substances

Hierarchy/Derived subclasses

71 / 1-> 11-> 27-> 28-> 29

uspto searches

Patent Apps in 71/29

Granted Patents in 71/29

Advanced search in patft or appft for the hierarchy would be:
(ccl/71/29)

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