E21C 25/58
Machines slitting by drilling hole on hole
E21C25/58 (Machines slitting by drilling hole on hole) appears on 37 US grants and 20 published applications in this corpus.
Search patents in E21C- Granted patents
- 37
- Published applications
- 20
- Assignees
- 18
- Inventors
- 43
- Latest grant
- 25 May 2010
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 3 |
| 2005 | 1 | 2 |
| 2006 | 0 | 2 |
| 2007 | 3 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and method for moving a mine conveyor segment25 May 2010US 7,721,869 B2Superior Highwall Miners, Inc.
- Auger car bearing support28 Apr 2009US 7,523,996 B1Republic Industries International, Inc.
- Auger car bearing support9 Dec 2008US 7,461,902 B1
- Boring rig15 Apr 2008US 7,357,458 B2Atlas Copco Rock Drills AB
- Friable sandstone structural blocks19 Jun 2007US 7,232,599 B2
- Devices, systems, and methods for aligning drill rigs20 Feb 2025US 2025/0059880 A1Veracio Ltd.
- Drilling Rig And Method Of Manoeuvring A Drilling Rig1 Oct 2015US 2015/0275663 A1Atlas Copco Rock Drills AB
- Launch vehicle for a mining system, a mining system and a method for mining3 Oct 2013US 2013/0257137 A9Caterpillar Global Mining Highwall Miners LLC
- Launch vehicle for a mining system, a mining system and a method for mining20 Dec 2012US 2012/0319451 A1Caterpillar Global Mining Highwall Miners LLC
- Drilling unit, method for slot drilling and slotting device27 Jan 2011US 2011/0017513 A1Sandvik Mining and Construction Oy
Most cited
By later US patents
- Highwall mining apparatus35US 5,692,807 AJoy MM Delaware, Inc. · 1997
- Mine drilling apparatus and method25US 4,059,163 ACaterpillar Tractor Co. · 1977
- Highwall mining system with driven conveyor units20US 5,609,397 AThe Broken Hill Proprietary Company Limited · 1997
- Latch mechanism for auger string couplings19US 4,021,126 AThe Salem Tool Company · 1977
- Auger car bearing support18US 7,523,996 B1Republic Industries International, Inc. · 2009