heat exchangers , e.g. radiators, condensers (making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22)

Introduced: September 1968

Title

Titles differ between systems:

IPC: heat exchangers, e.g. radiators, condensers

CPC: heat exchangers , e.g. radiators, condensers (making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22)

Full Title

Full titles differ between systems:

IPC:

Making other particular articles > heat exchangers, e.g. radiators, condensers

CPC:

Making other particular articles (making wire fabrics B21F; making chains or chain parts B21L) > heat exchangers , e.g. radiators, condensers (making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22)

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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B21D 53/022 +1 CPC CPC only CPC only
B21D 53/027 CPC only CPC only
B21D 53/04 of sheet metal +1 CPC IPC+CPC Available in IPC and CPC
B21D 53/06 of metal tubes IPC+CPC Available in IPC and CPC
B21D 53/08 of both metal tubes and sheet metal (connecting tubes in openings B21D39/06) +1 CPC IPC+CPC Available in IPC and CPC