Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 1/03: Sinking shafts mechanically (E21D 1/08 takes precedence)
E21D 1/03
Sub-Class
Stats
- 6 US PATENTS IN FORCE
- 1 US APPLICATIONS PENDING
- 1 Total Patent Owners
- 17 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10697246 | Shaft enlargement arrangement for a boring system | Jan 25, 16 | Jun 30, 20 | MASTER DRILLING SOUTH AFRICA (PTY) LTD. |
| 10385691 | Skip and crosshead | Aug 25, 14 | Aug 20, 19 | Technological Resources Pty Limited |
| 10041349 | Guide system | Jun 06, 14 | Aug 07, 18 | Technological Resources Pty. Limited |
| 10024156 | Method of moving a component or a material to and within a level of a shaft boring system | Apr 16, 14 | Jul 17, 18 | Technological Resources Pty. Limited |
| 8905486 | Underground mining | Jun 30, 10 | Dec 09, 14 | TECHNOLOGICAL RESOURCES PTY. LIMITED |
| 8591151 | Forming a shaft for an underground mine | Jun 15, 12 | Nov 26, 13 | TECHNOLOGICAL RESOURCES PTY. LIMITED |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2019/0085,689 | BOTTOM-SIDE SEPARATION OF AN OBJECT TO BE CUT OUT OF STONE | Jan 27, 17 | Mar 21, 19 | Heindl Energy GmbH |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 44 Months (last 2 years Issuances)
- 44 Months (last 5 years Issuances)