C01B 13/0222 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

C01B 13/0222

Full Title

Oxygen; Ozone; Oxides or hydroxides in general > Preparation of oxygen (by liquefying F25J)

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.