E21F 16/02
Drainage: of tunnels
Official title: of tunnels
E21F16/02 (Drainage: of tunnels) appears on 14 US grants and 11 published applications in this corpus.
Search patents in E21F- Granted patents
- 14
- Published applications
- 11
- Assignees
- 16
- Inventors
- 57
- Latest grant
- 10 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
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| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 2 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 2 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Blockage-proof water diversion and drainage devices for highway tunnel construction10 Sep 2024US 12,084,973 B1Northwest Institute of Eco-Environment and Resources, Cas
- Ultra-long tunnel sewage disposal, separation and drainage structure suitable for cold regions12 Sep 2023US 11,753,937 B2Cccc Second Highway Consultants Co., Ltd.
- Reinforcement system at railway tunnel section passing through karst cave with large dip angle and construction method27 Jun 2023US 11,686,198 B2China Railway 18 Bureau Group Co. Ltd.
- Tunnel adaptive lining structure in complex environment and construction method thereof15 Nov 2022US 11,499,427 B2China Institute of Water Resources and Hydropower Research
- Draining mesh module and a method of operating a draining mesh in a construction22 Dec 2020US 10,871,070 B2Dolenco Group ApS
- Method for constructing artificial water-conducting channel through pulse hydraulic fracturing of drainage boreholes in roof aquifer20 Nov 2025US 2025/0354488 A1China University of Mining and Technology
- Reinforcement system at railway tunnel section passing through karst cave with large dip angle and construction method2 Mar 2023US 2023/0068068 A1China Railway 18 Bureau Group Co. Ltd.
- Ultra-Long Tunnel Sewage Disposal, Separation and Drainage Structure Suitable for Cold Regions6 Oct 2022US 2022/0316337 A1Cccc Second Highway Consultants Co., Ltd.
- Tunnel adaptive lining structure in complex environment and construction method thereof21 Apr 2022US 2022/0120183 A1China Institute of Water Resources and Hydropower Research
- A Draining Mesh Module and a Method of Operating a Draining Mesh in a Construction7 Nov 2019US 2019/0338641 A1Dolenco Group ApS
Most cited
By later US patents
- Process for making silicon carbide reinforced silicon carbide composite57US 5,840,221 ASaint-Gobain/Norton Industrial Ceramics Corporation · 1998
- Silicon carbide reinforced silicon carbide composite33US 6,245,424 B1Saint-Gobain Industrial Ceramics, Inc. · 2001
- Waterproof cladding construction and method of providing the same15US 6,761,504 B1MBT Holding AG · 2004
- Insulating tunnel liner system10US 5,470,178 A1995
- Method and an apparatus for producing a draining channel5US 3,990,249 A1976