Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 5/012: Lining shafts; Linings therefor (E21D 11/00 takes precedence) Use of fluid-tight or anti-friction material on outside of, or between, lining layers
E21D 5/012
Sub-Class
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 1 Total Patent Owners
- 1 TOTAL INVENTORS
Recent Patents
Not Available
Recent Publications
Not Available
Top Owners in This Subclass
| Upgrade to the Professional Level to view Top Owners for this Subclass.Learn More |
|---|
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 6 Months (last 2 years Issuances)
- 6 Months (last 5 years Issuances)