Patent Classification Explorer PCE

DIFF Main Group

H01M 4/00

Electrodes

Introduced: July 1974

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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H01M 4/02 Electrodes composed of, or comprising, active material since 1974 +6 CPC IPC+CPC Available in IPC and CPC
H01M 4/86 Inert electrodes with catalytic activity, e.g. for fuel cells since 1974 +5 CPC IPC+CPC Available in IPC and CPC