characterised by the structure of the objects

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Making hollow objects > characterised by the structure of the objects

CPC:

Making hollow objects (from thick-walled or non uniform tubes B21K21/00) > characterised by the structure of the objects

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

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B21D 51/04 built-up objects, e.g. objects with rigidly-attached bottom or cover IPC+CPC Available in IPC and CPC
B21D 51/06 folded objects IPC+CPC Available in IPC and CPC
B21D 51/08 ball-shaped objects IPC+CPC Available in IPC and CPC
B21D 51/10 conically or cylindrically shaped objects IPC+CPC Available in IPC and CPC
B21D 51/12 objects with corrugated walls IPC+CPC Available in IPC and CPC
B21D 51/14 Flattening hollow objects for transport or storage; Re-forming same (making tubes from doubled flat material B21C37/14) IPC+CPC Available in IPC and CPC

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

Class B21,2013–2023, worldwide · Source: EPO PATSTAT