E21D 1/00
Sinking shafts
E21D1/00 (Sinking shafts) appears on 77 US grants and 50 published applications in this corpus.
Search patents in E21D- Granted patents
- 77
- Published applications
- 50
- Assignees
- 77
- Inventors
- 222
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 4 |
| 2013 | 2 | 1 |
| 2014 | 3 | 3 |
| 2015 | 3 | 5 |
| 2016 | 1 | 8 |
| 2017 | 1 | 1 |
| 2018 | 5 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 4 |
| 2021 | 2 | 0 |
| 2022 | 1 | 3 |
| 2023 | 0 | 2 |
| 2024 | 5 | 4 |
| 2025 | 1 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for emptying conveying buckets during the sinking of shafts6 Oct 2026US 12,753,693 B2Herrenknecht AG
- Shaft excavator23 Jun 2026US 12,662,940 B2REDPATH DEILMANN GmbH
- Device for sinking a vertical borehole17 Feb 2026US 12,553,286 B2Herrenknecht AG
- Drill head for creating a borehole in the ground4 Nov 2025US 12,460,487 B2Herrenknecht AG
- Underground mining methods via boreholes and multilateral blast-holes24 Sep 2024US 12,098,636 B2
- Device for emptying conveying buckets during the sinking of shafts1 Jan 2026US 2026/0002444 A1Herrenknecht AG
- Top-down sequential-building construction method for deep and large vertical shaft cavern group25 Dec 2025US 2025/0389189 A1China Tiesiju Civil Engineering Group Co., Ltd.
- Modular platform system for vertical ore stope mining11 Sep 2025US 2025/0283408 A1Nordic Minesteel Technologies Inc.
- Device for sinking a vertical borehole19 Jun 2025US 2025/0198284 A1Herrenknecht AG
- Shaft Excavator7 Nov 2024US 2024/0368989 A1REDPATH DEILMANN GmbH
Most cited
By later US patents
- Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation210US 4,597,444 AAtlantic Richfield Company · 1986
- Cutter head for pit-boring machine116US 4,448,269 AHitachi Construction Machinery Co., Ltd. · 1984
- Crane-mounted drill and method for in-situ treatment of contaminated soil97US 5,135,058 AMillgard Environmental Corporation · 1992
- Packer weighted and pressure differential method and apparatus for Big Hole drilling61US 4,534,426 AUnique Oil Tools, Inc. · 1985
- Method for placement of a permeable remediation zone in situ61US 5,730,550 ABoard of Trustees operating Michigan State University · 1998