E21D 15/005
Props: characterised by the material
Official title: {characterised by the material}
E21D15/005 (Props: characterised by the material) appears on 9 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 9
- Published applications
- 6
- Assignees
- 8
- Inventors
- 22
- Latest grant
- 26 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Internally injected replacement support room-type coal pillar recovery method26 Apr 2022US 11,313,226 B2China University of Mining and Technology
- Mine roof support5 Jan 2021US 10,883,366 B2Crosscut Enterprises LLC
- Mine roof support5 Sep 2017US 9,752,435 B2Setevox (Pty) Ltd
- Mine support and method of forming the same6 May 2003US 6,558,085 B1
- Variable yielding mining crib support column8 Aug 1995US 5,439,325 AMountainland Support, Inc.
- Pumpable hybrid cementitious material10 Sep 2026US 2026/0265145 A1Arizona Board of Regents on Behalf of the University of Arizona
- Support prop27 Mar 2025US 2025/0101869 A1Msp Mine Support Products (Pty) Ltd
- Internally injected replacement support room-type coal pillar recovery method3 Dec 2020US 2020/0378255 A1China University of Mining and Technology
- Mine roof support30 Apr 2020US 2020/0131905 A1Crosscut Enterprises LLC
- Mine roof support23 Jul 2015US 2015/0204192 A1Setevox (Pty) Ltd
Most cited
By later US patents
- Mine support and method of forming the same14US 6,558,085 B12003
- Method of and apparatus for supporting an overburden12US 4,249,837 AHeintzman GmbH & Co. · 1981
- Cribbing12US 4,565,469 ACommercial Shearing, Inc. · 1986
- Mine prop construction9US 4,192,479 A1980
- Collapsible crib mining support column9US 5,342,150 AMountainland Support, Inc. · 1994