of organic material, e.g. synthetic fibres

Introduced: September 1968

Full Title

Filtering material for liquid or gaseous fluids > Other self-supporting filtering material > of organic material, e.g. synthetic fibres

CPC subdivides this area 5x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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B01D 39/1607 +2 CPC CPC only CPC only
B01D 39/1638 +2 CPC CPC only CPC only
B01D 39/1669 +1 CPC CPC only CPC only
B01D 39/1692 CPC only CPC only
B01D 39/18 the material being cellulose or derivatives thereof ( ; making filter paper D21F11/14) IPC+CPC Available in IPC and CPC