Equipment or details not covered by groups E21B15/00 - E21B40/00

Introduced: September 1968

Title

Titles differ between systems:

IPC: Equipment or details not covered by groups

CPC: Equipment or details not covered by groups E21B15/00 - E21B40/00

Full titles differ between systems:

IPC:

Equipment or details not covered by groups

CPC:

Equipment or details not covered by groups E21B15/00 - E21B40/00

CPC subdivides this area 2x more granularly than IPC with 7 additional codes.

7 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

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E21B 41/0007 +1 CPC CPC only CPC only
E21B 41/0021 CPC only CPC only
E21B 41/0035 +1 CPC CPC only CPC only
E21B 41/005 +2 CPC CPC only CPC only
E21B 41/0078 CPC only CPC only
E21B 41/0085 CPC only CPC only
E21B 41/0099 CPC only CPC only
E21B 41/02 in situ inhibition of corrosion in boreholes or wells since 1980 IPC+CPC Available in IPC and CPC
E21B 41/04 Manipulators for underwater operations, e.g. temporarily connected to well heads since 1980 IPC+CPC Available in IPC and CPC
E21B 41/06 Work chambers for underwater operations, e.g. temporarily connected to well heads since 1980 IPC+CPC Available in IPC and CPC
E21B 41/08 Underwater guide bases, e.g. drilling templates; Levelling thereof since 2000 IPC+CPC Available in IPC and CPC
E21B 41/10 Guide posts, e.g. releasable; Attaching guide lines to underwater guide bases since 2000 IPC+CPC Available in IPC and CPC

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

Class E21,2013–2023, worldwide · Source: EPO PATSTAT