E21C 37/04
Mining or quarrying: other methods or devices for dislodging with or without
Official title: by devices with parts pressed mechanically against the wall of a borehole {or a slit}
E21C37/04 (Mining or quarrying: other methods or devices for dislodging with or without) appears on 29 US grants and 12 published applications in this corpus.
Search patents in E21C- Granted patents
- 29
- Published applications
- 12
- Assignees
- 12
- Inventors
- 37
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and apparatus for removing debris from a drill hole during drilling1 Jul 2025US 12,345,106 B2
- Method and apparatus for removing debris from a drill hole during drilling28 Feb 2023US 11,591,867 B2
- Method and apparatus for splitting or cleaving rock11 May 2021US 11,002,134 B2
- Enhanced endcap ram accelerator system3 Nov 2020US 10,822,877 B2Hypersciences, Inc.
- Hydraulically operated splitting device7 Apr 2020US 10,612,377 B2Darda Inc.
- Devices, systems, and methods for aligning drill rigs20 Feb 2025US 2025/0059880 A1Veracio Ltd.
- Method of mining a rock formation using a disc cutter and a rock breaker tool25 Jul 2024US 2024/0247588 A1Element Six (UK) Limited
- Method and apparatus for removing debris from a drill hole during drilling22 Feb 2024US 2024/0060371 A1
- Method and apparatus for removing debris from a drill hole during drilling10 Jun 2021US 2021/0172317 A1
- Enhanced endcap ram accelerator system27 Jun 2019US 2019/0195022 A1Hypersciences, Inc.
Most cited
By later US patents
- Method and apparatus for breaking hard compact material such as rock18US 4,099,784 AInstitut Cerac S. A. · 1978
- Method and apparatus for breaking a hard compact material such as rock or concrete12US 4,114,950 AInstitut Cerac S. A. · 1978
- Hydraulically actuated tool for mechanically splitting rock-like material10US 4,215,901 A1980
- Ram accelerator system with endcap6US 9,458,670 B2Hypersciences, Inc. · 2016
- Apparatus for mechanically breaking up rock4US 3,957,309 A1976