E21D 15/58
Devices for setting props or chocks
E21D15/58 (Devices for setting props or chocks) appears on 9 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 9
- Published applications
- 6
- Assignees
- 10
- Inventors
- 29
- Latest grant
- 24 Nov 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 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 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Mechanical constant-resistance single prop continuous prop lifting pre-tightening device and method24 Nov 2020US 10,844,717 B2China University of Mining and Technology
- Temporary support and raising device13 Nov 2018US 10,125,608 B2Mmc Innovations LLP
- Hydraulic assembly for a mining system29 May 2018US 9,982,799 B2Caterpillar Global Mining Europe GmbH
- Device for roof support of underground mine/tunnel23 Feb 2016US 9,267,375 B2Council of Scientific and Industrial Research
- Mining machine with sliding cutting tool assembly6 Aug 2002US 6,428,109 B1Voest-Alpine Bergtechnik Gesellschaft m.b.H.
- Mine roof support cribs19 Jun 2025US 2025/0198287 A1Mine Timber Technology (Int) Pty Ltd
- Mechanical constant-resistance single prop continuous prop lifting pre-tightening device and method30 Jul 2020US 2020/0240269 A1China University of Mining and Technology
- Temporary Support and Raising Device28 Sep 2017US 2017/0275994 A1Mmc Innovations LLP
- Hydraulic assembly for a mining system15 Sep 2016US 2016/0265685 A1Caterpillar Global Mining Europe GmbH
- Device for roof support of underground mine/tunnel14 Feb 2013US 2013/0039704 A1Council of Scientific and Industrial Research
Most cited
By later US patents
- Excavation roof support and method of installing the same18US 4,277,204 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1981
- Arrangement for erecting columnar supporting elements for underground excavations15US 4,332,512 ABochumer Eisenhuette Heintzmann GmbH & Co. · 1982
- Method of installation of cuttable mine support9US 6,196,635 B1Fosroc International Limited · 2001
- Temporary support and raising device4US 10,125,608 B2Mmc Innovations LLP · 2018
- Mining machine with sliding cutting tool assembly2US 6,428,109 B1Voest-Alpine Bergtechnik Gesellschaft m.b.H. · 2002