E21D 5/11
Lining shafts: with combinations of different materials
Official title: with combinations of different materials, e.g. wood, metal, concrete (E21D5/01, E21D5/012, E21D5/016 take precedence)
E21D5/11 (Lining shafts: with combinations of different materials) appears on 7 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 7
- Published applications
- 6
- Assignees
- 8
- Inventors
- 26
- Latest grant
- 30 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
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| 1997 | 0 | 0 |
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| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
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| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
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| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Prefabricated bamboo composite utility tunnel22 Jan 2019US 10,184,223 B2Zhejiang Xinzhou Bamboo-Based Composites Technology Co., Ltd.
- Shaft construction in the earth and method thereof9 Feb 2016US 9,255,476 B2Ric-Man Construction, Inc.
- Composite underground fluid conduit of concrete and steel sections30 Dec 1980US 4,241,762 AGutehoffnungshutte Sterkrade Aktiengesellschaft
- Apparatus, system and method for use with utility tunnels6 Aug 2026US 2026/0226830 A1British Telecommunications Public Ltd.Co.
- Anti-seismic support method for mine shaft20 Jan 2022US 2022/0018250 A1China Coal Research Institute
- Underground support system and method20 Aug 2020US 2020/0263542 A1Dsi Tunneling LLC
- Polymer liner system and method for lining a vertical shaft18 Jun 2020US 2020/0190979 A1Advantic LLC
- Prefabricated bamboo composite utility tunnel22 Feb 2018US 2018/0051437 A1Zhejiang Xinzhou Bamboo-Based Composites Technology Co., Ltd.
Most cited
By later US patents
- Composite underground fluid conduit of concrete and steel sections19US 4,241,762 AGutehoffnungshutte Sterkrade Aktiengesellschaft · 1980
- Concrete well casing with cable hooks embedded therein4US 4,070,832 A1978
- Shaft construction in the earth and method thereof4US 9,255,476 B2Ric-Man Construction, Inc. · 2016
- Casing voussoir3US 3,984,956 APont-A-Mousson S. A. · 1976
- Prefabricated bamboo composite utility tunnel1US 10,184,223 B2Zhejiang Xinzhou Bamboo-Based Composites Technology Co., Ltd. · 2019