E21D 11/04
Lining with building materials
Official title: Lining with building materials (E21D11/02, E21D11/14 take precedence {; compositions of mortars, concrete or like building materials C04B; placing filling-up materials in underground workings E21F15/00})
E21D11/04 (Lining with building materials) appears on 293 US grants and 219 published applications in this corpus.
Search patents in E21D- Granted patents
- 293
- Published applications
- 219
- Assignees
- 260
- Inventors
- 904
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 12 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 9 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 13 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 6 | 1 |
| 2002 | 4 | 1 |
| 2003 | 4 | 7 |
| 2004 | 4 | 2 |
| 2005 | 3 | 2 |
| 2006 | 1 | 3 |
| 2007 | 0 | 4 |
| 2008 | 1 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 3 |
| 2011 | 0 | 3 |
| 2012 | 5 | 5 |
| 2013 | 1 | 5 |
| 2014 | 3 | 10 |
| 2015 | 4 | 9 |
| 2016 | 6 | 8 |
| 2017 | 5 | 8 |
| 2018 | 9 | 15 |
| 2019 | 10 | 21 |
| 2020 | 13 | 17 |
| 2021 | 15 | 22 |
| 2022 | 13 | 11 |
| 2023 | 12 | 17 |
| 2024 | 15 | 16 |
| 2025 | 19 | 13 |
| 2026 | 6 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Double-liquid grouting slurry, its technology and application for super large diameter underwater shield engineering under high water pressure condition22 Sep 2026US 12,741,910 B2China Railway 14th Bureau Group Corporation Limited
- Structural system for building and civil engineering works and construction method15 Sep 2026US 12,735,889 B2
- Tunnel constraint anchor cable and method for improving stability of initial support structure14 Jul 2026US 12,680,451 B2Chang An University
- Work carriage for the lining of tunnels30 Jun 2026US 12,669,054 B2Hinfra S.R. L.
- Automated method and processing train for lining tunnels21 Apr 2026US 12,607,122 B2Hinfra S.R. L.
- Self-launching formwork system and method for lining a tunnel17 Sep 2026US 2026/0275865 A1Grupo Empresarial Tecozam SL
- Inverted arch structure and construction method therefor3 Sep 2026US 2026/0258727 A1China University of Geosciences
- Post-mining water-resisting layer reconstruction method and related device23 Jul 2026US 2026/0210248 A1China University of Mining and Technology, Beijing
- Method for lifting subway shield tunnel by polymer grouting11 Jun 2026US 2026/0160166 A1BeSTDR Infrastructure Hospital (Pingyu)
- Tunnel lining element28 May 2026US 2026/0146534 A1Herrenknecht AG
Most cited
By later US patents
- Mobile train for backfilling tunnel liners with cement grout59US 5,141,363 A1992
- Method and apparatus for continuous mixing and injection of foamed cement grout47US 5,419,632 A1995
- Lining or relining of tunnels27US 4,347,018 AJohnston Construction Limited · 1982
- Reinforced earth structures and method of construction thereof25US 5,207,038 A1993
- Shotcrete spraying process24US 5,851,580 A1998