Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)

Introduced: July 1974

Title

Titles differ between systems:

IPC: Ferrous alloys, e.g. steel alloys

CPC: Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)

Full titles differ between systems:

IPC:

Ferrous alloys, e.g. steel alloys

CPC:

Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)

Of 16 combined children, 10 exist in both systems.

6 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

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C22C 38/001 CPC only CPC only
C22C 38/002 CPC only CPC only
C22C 38/004 CPC only CPC only
C22C 38/005 CPC only CPC only
C22C 38/007 CPC only CPC only
C22C 38/008 CPC only CPC only
C22C 38/02 containing silicon since 1974 IPC+CPC Available in IPC and CPC
C22C 38/04 containing manganese since 1974 IPC+CPC Available in IPC and CPC
C22C 38/06 containing aluminium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/08 containing nickel since 1974 IPC+CPC Available in IPC and CPC
C22C 38/10 containing cobalt since 1974 +1 CPC IPC+CPC Available in IPC and CPC
C22C 38/12 containing tungsten, tantalum, molybdenum, vanadium, or niobium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/14 containing titanium or zirconium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/16 containing copper since 1974 IPC+CPC Available in IPC and CPC
C22C 38/18 containing chromium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/60 containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur since 1974 IPC+CPC Available in IPC and CPC

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

Class C22,2013–2023, worldwide · Source: EPO PATSTAT