Fuel cells; Manufacture thereof

Introduced: July 1974

Of 13 combined children, 12 exist in both systems.

1 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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H01M 8/002 +2 CPC CPC only CPC only
H01M 8/008 Disposal or recycling of fuel cells since 2016 IPC+CPC Available in IPC and CPC
H01M 8/02 Details (electrodes H01M4/86 - H01M4/98) since 1974 IPC+CPC Available in IPC and CPC
H01M 8/04 Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids since 1974 IPC+CPC Available in IPC and CPC
H01M 8/06 Combination of fuel cells with means for production of reactants or for treatment of residues (regenerative fuel cells H01M8/18) since 1974 +1 CPC IPC+CPC Available in IPC and CPC
H01M 8/08 Fuel cells with aqueous electrolytes since 1974 IPC+CPC Available in IPC and CPC
H01M 8/10 Fuel cells with solid electrolytes since 1974 +1 CPC IPC+CPC Available in IPC and CPC
H01M 8/14 Fuel cells with fused electrolytes since 1974 +6 CPC IPC+CPC Available in IPC and CPC
H01M 8/16 Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts since 1974 IPC+CPC Available in IPC and CPC
H01M 8/18 Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells since 1974 +2 CPC IPC+CPC Available in IPC and CPC
H01M 8/20 Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence) since 1974 IPC+CPC Available in IPC and CPC
H01M 8/22 Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen since 1974 +3 CPC IPC+CPC Available in IPC and CPC
H01M 8/24 Grouping of fuel cells, e.g. stacking of fuel cells since 1974 +1 CPC IPC+CPC Available in IPC and CPC