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DIFF Subgroup
F01K 3/22

Controlling, e.g. starting, stopping (F01K7/00, F01K13/02 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Controlling, e.g. starting, stopping

CPC: Controlling, e.g. starting, stopping (F01K7/00, F01K13/02 take precedence)

Full Title

Full titles differ between systems:

IPC:

Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein > having heaters > with heating by combustion gases of main boiler > Controlling, e.g. starting, stopping

CPC:

Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K19/00) > having heaters (having both steam accumulator and heater F01K3/14; steam heaters per se F22) > with heating by combustion gases of main boiler > Controlling, e.g. starting, stopping (F01K7/00, F01K13/02 take precedence)

No child classifications to compare. This is a leaf node in both IPC and CPC.