IPC Main Group
E21F 15/00 Methods or devices for placing filling-up materials in underground workings
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Related Keywords
FILLING UP in minesSTOWAGE in mines [= filling-up]
3 direct subcodes
Child Classifications
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- E21F 15/02 Supporting means, e.g. shuttering, for filling-up materials
- E21F 15/06 Filling-up mechanically
- E21F 15/08 Filling-up hydraulically or pneumatically