C21B 13/0006 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

C21B 13/0006

Full Title

Making spongy iron or liquid steel, by direct processes

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.