Shaft or like vertical or substantially vertical furnaces

Introduced: September 1968

Additional Content IPC

Preheating, burning, calcining or cooling lime, magnesia or dolomite in shaft or vertical furnaces

Of 5 combined children, 4 exist in both systems.

1 codes are CPC-only extensions.

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F27B 1/005 CPC only CPC only
F27B 1/02 with two or more shafts or chambers, e.g. multi-storey +1 CPC IPC+CPC Available in IPC and CPC
F27B 1/06 of other than up-draught type IPC+CPC Available in IPC and CPC
F27B 1/08 heated otherwise than by solid fuel mixed with charge IPC+CPC Available in IPC and CPC
F27B 1/10 Details, accessories or equipment specially adapted for furnaces of these types IPC+CPC Available in IPC and CPC

Class F27,2013–2023, worldwide · Source: EPO PATSTAT

Class F27,2013–2023, worldwide · Source: EPO PATSTAT