Inert electrodes with catalytic activity, e.g. for fuel cells

Introduced: July 1974

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Electrodes > Inert electrodes with catalytic activity, e.g. for fuel cells

Of 10 combined children, 5 exist in both systems.

5 codes are CPC-only extensions.

IPC defines codes here since 1974.

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H01M 2004/8678 2nd only +3 CPC CPC only CPC only
H01M 4/8605 +4 CPC CPC only CPC only
H01M 4/8636 +1 CPC CPC only CPC only
H01M 4/8647 +2 CPC CPC only CPC only
H01M 4/8663 +2 CPC CPC only CPC only
H01M 4/88 Processes of manufacture since 1974 +5 CPC IPC+CPC Available in IPC and CPC
H01M 4/90 Selection of catalytic material since 1974 +5 CPC IPC+CPC Available in IPC and CPC
H01M 4/94 Non-porous diffusion electrodes, e.g. palladium membranes, ion exchange membranes since 1974 IPC+CPC Available in IPC and CPC
H01M 4/96 Carbon-based electrodes since 1974 IPC+CPC Available in IPC and CPC
H01M 4/98 Raney-type electrodes since 1974 IPC+CPC Available in IPC and CPC