DIFF Main Group
C22B 3/00 Extraction of metal compounds from ores or concentrates by wet processes
Introduced: September 1968
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C22B 3/04 by leaching (C22B3/18 takes precedence) since 1990 +1 CPC IPC+CPC Available in IPC and CPC
- C22B 3/18 with the aid of microorganisms or enzymes, e.g. bacteria or algae since 1990 IPC+CPC Available in IPC and CPC
- C22B 3/20 Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence) since 1990 +1 CPC IPC+CPC Available in IPC and CPC