Patent Classification Explorer PCE

DIFF Main Group

C01G 27/00

Compounds of hafnium

Introduced: September 1968

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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C01G 27/003 CPC only CPC only
C01G 27/006 CPC only CPC only
C01G 27/02 Oxides IPC+CPC Available in IPC and CPC
C01G 27/04 Halides IPC+CPC Available in IPC and CPC
C01G 27/06 Sulfates IPC+CPC Available in IPC and CPC