Obtaining niobium, tantalum or vanadium

Introduced: July 1974

Full Title

Obtaining refractory metals > Obtaining niobium, tantalum or vanadium

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1974.

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C22B 34/22 Obtaining vanadium since 1974 +1 CPC IPC+CPC Available in IPC and CPC
C22B 34/24 Obtaining niobium or tantalum since 1974 IPC+CPC Available in IPC and CPC