Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 1/00: Sinking shafts
E21D 1/00
Sub-Class
Stats
- 12 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 6 Total Patent Owners
- 59 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10788408 | Method for determining diffusion radius of in-situ injection and remediation of contaminated soil and groundwater | May 16, 17 | Sep 29, 20 | BCEG ENVIRONMENTAL REMEDIATION CO., LTD. |
| 10150649 | Overwind conveyance drop protection | Jun 06, 14 | Dec 11, 18 | Technological Resources Pty. Limited |
| 9995086 | Center-pillared full-face shaft drilling machine | Dec 09, 14 | Jun 12, 18 | Not available |
| 9631433 | Method and apparatus for introducing or sinking cavities in rock | Mar 15, 13 | Apr 25, 17 | Not available |
| 9255476 | Shaft construction in the earth and method thereof | Aug 19, 13 | Feb 09, 16 | Ric-Man Construction, Inc. |
| 9091779 | Advanced detector system and method using forward three-dimensional induced polarization method for TBM construction tunnel | Jan 17, 13 | Jul 28, 15 | SHANDONG UNIVERSITY |
| 8607480 | Earth moving bucket | Nov 30, 09 | Dec 17, 13 | Not available |
| 7682107 | Remote mine seal spray nozzle assembly, system and methods of use | Mar 29, 06 | Mar 23, 10 | HOWARD CONCRETE PUMPING, INC. |
| 7293615 | Earth boring system | Nov 22, 04 | Nov 13, 07 | J.S. REDPATH LIMITED |
| 5595459 | Cofferdam for 4', 8' and 12' diameter tanks | Oct 02, 95 | Jan 21, 97 | Not available |
| 5578150 | Heat treatment process for wire rods | Jun 06, 95 | Nov 26, 96 | NIPPON STEEL CORPORATION |
| 5366029 | Large shaft over-reamer apparatus and method | Apr 09, 93 | Nov 22, 94 | 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
- 33 Months (last 2 years Issuances)
- 33 Months (last 5 years Issuances)