Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 1/10: Sinking shafts Preparation of the ground
E21D 1/10
Sub-Class
Stats
- 0 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 0 Total Patent Owners
- 6 TOTAL INVENTORS
Recent Patents
Not Available
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2020/0208,517 | UNDERGROUND VERTICAL SHAFTS AND NUCLEAR REACTORS USING THE SAME | Dec 31, 18 | Jul 02, 20 | Not available |
| 2020/0088,030 | UNDERGROUND SHAFT DEVELOPMENT METHOD | May 15, 18 | Mar 19, 20 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 20 Months (last 2 years Issuances)
- 20 Months (last 5 years Issuances)