E21C 37/14
By compressed air
Official title: by compressed air; by gas blast; by gasifying liquids
E21C37/14 (By compressed air) appears on 21 US grants and 15 published applications in this corpus.
Search patents in E21C- Granted patents
- 21
- Published applications
- 15
- Assignees
- 20
- Inventors
- 49
- Latest grant
- 2 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Air lifting sand2 Jul 2024US 12,024,989 B2Sio Silica Coporation
- Supercritical fluid drilling and blasting integrated double-arm drill jumbo and control method thereof25 Apr 2023US 11,634,986 B2Hohai University
- Borehole sealing and improved foam properties for controlled foam injection (CFI) fragmentation of hard compact materials19 Jan 2021US 10,895,152 B1CFI Technologies, LLC
- Drill and blast method and apparatus for the same26 May 2020US 10,662,771 B2Centre for Excellence In Mining Innovation
- Fluid release mechanism for a chemically-inflatable bag22 Oct 2019US 10,450,818 B2Stemlock, Incorporated
- Air lifting sand22 Jun 2023US 2023/0193735 A1Sio Silica Coporation
- Supercritical fluid drilling and blasting integrated double-arm drill jumbo and control method thereof17 Nov 2022US 2022/0364468 A1Hohai University
- Rapid development mobile canopy for underground mining6 Feb 2020US 2020/0040725 A1
- Drill and blast method and apparatus for the same17 Jan 2019US 2019/0017379 A1Centre for Excellence In Mining Innovation
- Fluid release mechanism for a chemically-inflatable bag24 Aug 2017US 2017/0241220 A1Stemlock, Incorporated
Most cited
By later US patents
- Controlled fracture method and apparatus for breaking hard compact rock and concrete materials37US 5,098,163 ASunburst Recovery, Inc. · 1992
- Method and apparatus for penetrating hard materials using a energetic slurry17US 6,591,731 B2APTI, Inc. · 2003
- Small charge blasting apparatus including device for sealing pressurized fluids in holes11US 6,339,992 B12002
- Method of underground rock blasting7US 9,243,879 B2Orica Explosives Technology Pty Ltd · 2016
- Air shooting system for the mining of coal or the like5US 4,301,731 AZeto Industries, Inc. · 1981