Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution

Introduced: January 1990

Of 10 combined children, 8 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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D21H 17/005 CPC only CPC only
D21H 17/01 Waste products, e.g. sludge since 1990 IPC+CPC Available in IPC and CPC
D21H 17/02 Material of vegetable origin (proteins D21H17/22; lignins D21H17/23; polysaccharides D21H17/24; rosin D21H17/62) since 1990 IPC+CPC Available in IPC and CPC
D21H 17/03 Non-macromolecular organic compounds since 1990 IPC+CPC Available in IPC and CPC
D21H 17/20 Macromolecular organic compounds since 1990 IPC+CPC Available in IPC and CPC
D21H 17/60 Waxes since 1990 IPC+CPC Available in IPC and CPC
D21H 17/61 Bitumen since 1990 IPC+CPC Available in IPC and CPC
D21H 17/62 Rosin; Derivatives thereof since 1990 IPC+CPC Available in IPC and CPC
D21H 17/63 Inorganic compounds since 1990 IPC+CPC Available in IPC and CPC
D21H 17/71 +3 CPC CPC only CPC only

Class D21,2013–2023, worldwide · Source: EPO PATSTAT

Class D21,2013–2023, worldwide · Source: EPO PATSTAT