Chemistry: Fertilizers Patents (Class 71)
Processes and products (Class 71/1)

Cross-Reference Art Collections

Foams (Class 71/900)
Refuse conditioning (Class 71/901)
Nitrification inhibition (Class 71/902)
Soil conditioner (Class 71/903)
Carrier (Class 71/904)

Foreign Patent Art Collections

Class-related foreign documents (Class 71/FOR000)

Digests

Chelating agent (Class 71/DIG2)
Defluorination (Class 71/DIG3)
Anti-corrosion (Class 71/DIG4)