by leaching (C22B3/18 takes precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: by leaching

CPC: by leaching (C22B3/18 takes precedence)

Full titles differ between systems:

IPC:

Extraction of metal compounds from ores or concentrates by wet processes > by leaching

CPC:

Extraction of metal compounds from ores or concentrates by wet processes > by leaching (C22B3/18 takes precedence)

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 1990.

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C22B 3/045 CPC only CPC only
C22B 3/06 in inorganic acid solutions since 1990 +1 CPC IPC+CPC Available in IPC and CPC
C22B 3/12 in inorganic alkaline solutions since 1990 IPC+CPC Available in IPC and CPC
C22B 3/16 in organic solutions since 1990 +3 CPC IPC+CPC Available in IPC and CPC

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

Class C22,2013–2023, worldwide · Source: EPO PATSTAT