C01B 3/503 characterised by membranes
Introduced: January 2026
Full Title
Full titles differ between systems:
Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen > Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification > by diffusion > characterised by membranes
Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen (production of water-gas or synthesis gas from solid carbonaceous material C10J) > Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification > by diffusion > characterised by membranes
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2026.
Child Classifications
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