E21D 5/12
Accessories for making shaft linings
Official title: Accessories for making shaft linings, e.g. suspended cradles, shutterings
E21D5/12 (Accessories for making shaft linings) appears on 17 US grants and 10 published applications in this corpus.
Search patents in E21D- Granted patents
- 17
- Published applications
- 10
- Assignees
- 12
- Inventors
- 58
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls4 Aug 2026US 12,698,709 B2
- Method for calculating diameter of annular non-full formwork support for circular shaft5 May 2026US 12,618,668 B2China Railway No. 8 Engineering Group Co., Ltd.
- Shuttering with supporting ring having expendable drawers29 Nov 2022US 11,512,591 B2REDPATH DEILMANN GmbH
- Anti-seismic support method for mine shaft30 Aug 2022US 11,428,101 B2China Coal Research Institute
- Underground support system and method17 Aug 2021US 11,092,010 B2Dsi Tunneling LLC
- Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls12 Feb 2026US 2026/0043330 A1China University of Mining and Technology
- Method for calculating diameter of annular non-full formwork support for circular shaft15 May 2025US 2025/0155240 A1China Railway No. 8 Engineering Group Co., Ltd.
- Anti-seismic support method for mine shaft20 Jan 2022US 2022/0018250 A1China Coal Research Institute
- Shuttering with supporting ring having extendable drawers13 Jan 2022US 2022/0010679 A1REDPATH DEILMANN GmbH
- Apparatus and method for slipforming a shaft7 Jan 2021US 2021/0003010 A1
Most cited
By later US patents
- Technique for lining shaft12US 3,958,637 AThe United States of America as represented by the Secretary of the Interior · 1976
- Method of lining a vertical mine shaft with concrete12US 4,270,876 AThe United States of America as represented by the United States Department of Energy · 1981
- Mine shaft liner10US 4,460,293 ASanta Fe International Corporation · 1984
- Formwork apparatus7US 5,417,519 A1995
- Slipforming method and apparatus for in situ lining of an upwardly open shaft with monolithic concrete6US 4,031,708 A1977