Other direct-contact heat-exchange apparatus

Introduced: September 1968

Of 5 combined children, 4 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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F28C 3/005 CPC only CPC only
F28C 3/02 the heat-exchange media both being gases or vapours IPC+CPC Available in IPC and CPC
F28C 3/04 the heat-exchange media both being liquids IPC+CPC Available in IPC and CPC
F28C 3/06 the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22) IPC+CPC Available in IPC and CPC
F28C 3/10 one heat-exchange medium at least being a fluent solid, e.g. a particulate material IPC+CPC Available in IPC and CPC

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

Class F28,2013–2023, worldwide · Source: EPO PATSTAT