DIFF Subgroup
H01M 8/04089 of gaseous reactants
Introduced: January 2016
Full Title
Fuel cells; Manufacture thereof > Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids > Arrangements for control of reactant parameters, e.g. pressure or concentration > of gaseous reactants
Of 4 combined children, 2 exist in both systems.
2 codes are CPC-only extensions.
IPC defines codes here since 2016.
Child Classifications
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- H01M 8/04119 with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying since 2016 +2 CPC IPC+CPC Available in IPC and CPC