E21D 11/155
Laggings made of strips, slats, slabs or sheet piles
Official title: {Laggings made of strips, slats, slabs or sheet piles (longitudinal struts for mine arches E21D11/28)}
E21D11/155 (Laggings made of strips, slats, slabs or sheet piles) appears on 14 US grants and 18 published applications in this corpus.
Search patents in E21D- Granted patents
- 14
- Published applications
- 18
- Assignees
- 14
- Inventors
- 41
- Latest grant
- 16 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rock burst active prevention and control mechanism16 Jul 2024US 12,037,904 B1China University of Mining and Technology, Beijing
- Asymmetric support structure of entry driven along gob-side under unstable roof in deep mines and construction method thereof15 Oct 2019US 10,443,380 B2Shandong University of Science and Technology
- Method and system of coal mine roof stabilization12 Feb 2019US 10,202,848 B2REI, Inc.
- Fill fence system and method for installing same15 May 2018US 9,970,291 B2Sturda Inc.
- Retainment wall for underground mine and method of construction11 Apr 2017US 9,617,705 B2Heintzmann Corporation
- Asymmetric support structure of entry driven along gob-side under unstable roof in deep mines and construction method thereof18 Jul 2019US 2019/0218910 A1Shandong University of Science and Technology
- Method and system of coal mine roof stabilization23 May 2019US 2019/0153862 A1REI, Inc.
- Fill fence system and method for installing same5 Apr 2018US 2018/0094524 A1Sturda Inc.
- Method and system of coal mine roof stabilization1 Dec 2016US 2016/0348505 A1REI, Inc.
- Retainment wall for underground mine and method of construction17 Nov 2016US 2016/0333543 A1Heintzmann Corporation
Most cited
By later US patents
- Duct repairing material, repairing structure, and repairing method12US 6,796,334 B2Ashimori Engineering Co., Ltd. · 2004
- Shoring supports7US 4,464,084 ASerni Limited · 1984
- Method and apparatus for feeding a tunnel roof support system from the roof shield of a TBM6US 6,468,000 B2C & M McNally Engineering Corp. · 2002
- Square embossed roof and rib plate4US 7,284,933 B2Jennmar Corporation · 2007
- Reinforcement method and reinforcement structure of the corrugated steel plate structure4US 8,220,220 B2Fixon E&C Co., Ltd. · 2012