C21B 5/001 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

C21B 5/001

Full Title

Making pig-iron in the blast furnace

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

This code exists only in CPC.

Diff view requires codes present in both systems.