Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Other methods or devices for dislodging with or without loading

CPC: Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14)

Full titles differ between systems:

IPC:

Other methods or devices for dislodging with or without loading

CPC:

Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14)

Of 9 combined children, 8 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

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E21C 37/005 CPC only CPC only
E21C 37/02 by wedges IPC+CPC Available in IPC and CPC
E21C 37/04 by devices with parts pressed mechanically against the wall of a borehole IPC+CPC Available in IPC and CPC
E21C 37/06 by making use of hydraulic or pneumatic pressure in a borehole IPC+CPC Available in IPC and CPC
E21C 37/16 by fire-setting or by similar methods based on a heat effect (drilling by use of heat E21B7/14) IPC+CPC Available in IPC and CPC
E21C 37/18 by electricity IPC+CPC Available in IPC and CPC
E21C 37/20 by ultrasonic waves IPC+CPC Available in IPC and CPC
E21C 37/22 Hand tools or hand-held power-operated tools specially adapted for dislodging minerals (slitting machines guided solely by hand E21C25/64) IPC+CPC Available in IPC and CPC
E21C 37/26 Chisels or other cutting tools not mentioned before IPC+CPC Available in IPC and CPC

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

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