Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor

Introduced: January 1990

IPC and CPC are identically structured here. All 7 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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B01D 69/02 characterised by their properties since 1990 IPC+CPC Available in IPC and CPC
B01D 69/04 Tubular membranes since 1990 +2 CPC IPC+CPC Available in IPC and CPC
B01D 69/06 Flat membranes since 1990 +1 CPC IPC+CPC Available in IPC and CPC
B01D 69/08 Hollow fibre membranes (manufacture of hollow fibres D01D5/24, D01F1/08) since 1990 +5 CPC IPC+CPC Available in IPC and CPC
B01D 69/10 Supported membranes; Membrane supports since 1990 +4 CPC IPC+CPC Available in IPC and CPC
B01D 69/12 Composite membranes; Ultra-thin membranes since 1990 +7 CPC IPC+CPC Available in IPC and CPC
B01D 69/14 Dynamic membranes since 1990 +1 CPC IPC+CPC Available in IPC and CPC

Class B01,2013–2023, worldwide · Source: EPO PATSTAT

Class B01,2013–2023, worldwide · Source: EPO PATSTAT