Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 5/01: Lining shafts; Linings therefor (E21D 11/00 takes precedence) using prefabricated lining lowered into a hole filled with liquid or viscous mass
E21D 5/01
Sub-Class
Stats
- 2 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 0 Total Patent Owners
- 12 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11988044 | Excavation boring and shoring method and equipment | Sep 16, 22 | May 21, 24 | Not available |
| 11143027 | Rectangular working well with preset pipe jacking hole and sliding back wall in water-rich stratum and construction method thereof | Apr 23, 20 | Oct 12, 21 | Infrastructure Renewal Institute of Southern China; WELEAD Infrastructure Engineering Technology (Zhengzhou), Ltd.; |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0218,741 | EXCAVATION BORING AND SHORING TOOL | Mar 13, 24 | Jul 04, 24 | Not available |
| 2024/0209,692 | EXCAVATION AND SHORING EQUIPMENT | Mar 13, 24 | Jun 27, 24 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 9 Months (last 2 years Issuances)
- 9 Months (last 5 years Issuances)