E21D 5/04
Lining shafts: with brick, concrete, stone, or similar building materials
Official title: with brick, concrete, stone, or similar building materials (E21D5/01, E21D5/012, E21D5/016 take precedence)
E21D5/04 (Lining shafts: with brick, concrete, stone, or similar building materials) appears on 16 US grants and 10 published applications in this corpus.
Search patents in E21D- Granted patents
- 16
- Published applications
- 10
- Assignees
- 15
- Inventors
- 92
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 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 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 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 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 3 |
| 2017 | 1 | 1 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 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.
- Full-face shaft boring machine, boring system, and boring method9 Sep 2025US 12,410,660 B1China University of Mining and Technology, Beijing
- Shuttering with supporting ring having expendable drawers29 Nov 2022US 11,512,591 B2REDPATH DEILMANN GmbH
- Shaft enlargement arrangement for a boring system30 Jun 2020US 10,697,246 B2Master Drilling South Africa (Pty) Ltd.
- 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.
- Shuttering with supporting ring having extendable drawers13 Jan 2022US 2022/0010679 A1REDPATH DEILMANN GmbH
- Shaft enlargement arrangement for a boring system11 Jan 2018US 2018/0010392 A1Masters Sinkers (PTY) Ltd.
- Formwork System7 Sep 2017US 2017/0254202 A1
Most cited
By later US patents
- Method and system for lining shafts16US 4,473,322 A1984
- 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
- Slipforming method and apparatus for in situ lining of an upwardly open shaft with monolithic concrete6US 4,031,708 A1977
- Slipforming method and apparatus for in situ lining of an upwardly open shaft with monolithic concrete4US 4,055,958 A1977
- Formwork system4US 9,945,229 B22018