characterised by the fuel supply (burners F23D)

Introduced: January 1980

Title

Titles differ between systems:

IPC: characterised by the fuel supply

CPC: characterised by the fuel supply (burners F23D)

Full titles differ between systems:

IPC:

Continuous combustion chambers using liquid or gaseous fuel > characterised by the fuel supply

CPC:

Continuous combustion chambers using liquid or gaseous fuel > characterised by the fuel supply (burners F23D)

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1980.

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F23R 3/283 CPC only CPC only
F23R 3/286 CPC only CPC only
F23R 3/30 comprising fuel prevapourising devices since 1980 IPC+CPC Available in IPC and CPC
F23R 3/34 Feeding into different combustion zones since 1980 +2 CPC IPC+CPC Available in IPC and CPC
F23R 3/36 Supply of different fuels since 1980 IPC+CPC Available in IPC and CPC
F23R 3/38 comprising rotary fuel injection means since 1980 IPC+CPC Available in IPC and CPC

Class F23,2013–2023, worldwide · Source: EPO PATSTAT

Class F23,2013–2023, worldwide · Source: EPO PATSTAT