B01D 39/1638 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

B01D 39/1638

Full Title

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

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.