DIFF Main Group
E21C 37/00 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 Title
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.
Child Classifications
Navigate with arrow keys, Enter to open
- 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 37/22 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