Description
SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)
E21D
Technology
Sub-Class
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- 8 515 US PATENTS IN FORCE
- 131 US APPLICATIONS PENDING
- 926 Total Patent Owners
- 2733 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Sinking shafts |
| 1/02 | Sinking shafts by hand |
| 1/03 | Sinking shafts mechanically (E21D 1/08 takes precedence) |
| 1/04 | Sinking shafts mechanically (E21D 1/08 takes precedence) with grabs |
| 1/06 | Sinking shafts mechanically (E21D 1/08 takes precedence) with shaft-boring cutters (drilling machines E21B) |
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 9,120,614 | Method for preserving the firmness and internal pressure of a resin cartridge and improving the shelf-life of a resin cartridge | Oct 12, 11 | Sep 01, 15 | DSI UNDERGROUND SYSTEMS, INC. |
| 9,109,445 | Shield canopy for a shield-type support | Nov 16, 10 | Aug 18, 15 | CATERPILLAR GLOBAL MINING EUROPE GMBH |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2015/0232,280 | Roof Mountable Support System | Sep 13, 13 | Aug 20, 15 | BULK SOLUTIONS PTY LTD |
| 2015/0233,242 | COMPREHENSIVE ADVANCED GEOLOGICAL DETECTION SYSTEM CARRIED ON TUNNEL BORING MACHINE | Jan 26, 14 | Aug 20, 15 | Not available |
| 2015/0233,243 | METHOD AND DEVICE FOR TRANSPORTING OVERBURDEN AWAY DURING TUNNELLING | Oct 07, 13 | Aug 20, 15 | HERRENKNECHT AG |
| 2015/0233,244 | ROCK BOLT | Feb 18, 15 | Aug 20, 15 | MINE SUPPORT PRODUCTS (PTY) LTD |
| 2015/0225,173 | TUNNELED GAS STORAGE | Jul 17, 13 | Aug 13, 15 | |
| 2015/0226,248 | Torque Tension Breakaway Nut | Feb 13, 15 | Aug 13, 15 |
Top Owners in This Class
Top Owners in This Subclass
Applications Filed in This Class - By Year
Applications Filed in This Subclass - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 31 Months (last 2 years Issuances)
- 31 Months (last 5 years Issuances)
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