Steam engine plants not otherwise provided for

Introduced: September 1968

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F01K 21/005 CPC only CPC only
F01K 21/02 with steam-generation in engine-cylinders IPC+CPC Available in IPC and CPC
F01K 21/04 using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas (; direct-contact steam generators in general F22B) +3 CPC IPC+CPC Available in IPC and CPC
F01K 21/06 Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine IPC+CPC Available in IPC and CPC