Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Vertical ducts; Channels, e.g. for drainage

CPC: Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D )

Full titles differ between systems:

IPC:

Vertical ducts; Channels, e.g. for drainage

CPC:

Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D )

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

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E04F 17/005 CPC only CPC only
E04F 17/02 for carrying away waste gases, e.g. flue gases (free-standing chimneys E04H12/28; connections between fireplace and chimney, chimney fittings, covers for cleaning holes of chimneys F23J; chimney tops F23L); Building elements specially designed therefor, e.g. shaped bricks or sets thereof +2 CPC IPC+CPC Available in IPC and CPC
E04F 17/04 Air-ducts or air channels IPC+CPC Available in IPC and CPC
E04F 17/06 Light shafts, e.g. for cellars IPC+CPC Available in IPC and CPC
E04F 17/08 for receiving utility lines, e.g. cables, pipes (covers giving access to the ducts or channels, covers of inspection holes E04F19/08) IPC+CPC Available in IPC and CPC
E04F 17/10 Arrangements in buildings for the disposal of refuse (refuse bins, gathering or removal of refuse B65F) IPC+CPC Available in IPC and CPC

Class E04,2013–2023, worldwide · Source: EPO PATSTAT

Class E04,2013–2023, worldwide · Source: EPO PATSTAT