E21C 37/02
Mining or quarrying: other methods or devices for dislodging with or without
Official title: by wedges
E21C37/02 (Mining or quarrying: other methods or devices for dislodging with or without) appears on 14 US grants and 8 published applications in this corpus.
Search patents in E21C- Granted patents
- 14
- Published applications
- 8
- Assignees
- 9
- Inventors
- 28
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 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 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
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
- Hydraulically operated splitting device7 Apr 2020US 10,612,377 B2Darda Inc.
- Drilling and bursting heading machine19 Mar 2019US 10,233,755 B2China University of Mining and Technology
- 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
- Hydraulically operated splitting device24 Jan 2019US 2019/0024507 A1Darda Inc.
- Method and apparatus for splitting or cleaving rock27 Dec 2018US 2018/0371906 A1
- Drilling and Bursting Heading Machine12 Jul 2018US 2018/0195388 A1China University of Mining and Technology
Most cited
By later US patents
- Apparatus for mechanically breaking up stone or reinforced concrete3US 4,026,602 AH. Bieri AG Liebefeld · 1977
- Apparatus for building-up bursting forces2US 4,865,391 A1989
- Process and device for splitting stones2US 6,539,933 B1Stu-Stein, Teknologi og Utvikling · 2003
- Method and apparatus for splitting or cleaving rock1US 10,087,755 B22018
- Drilling and bursting heading machine1US 10,233,755 B2China University of Mining and Technology · 2019