E21C 37/12
By injecting into the borehole a liquid, either initially at high pressure
Official title: by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid (slitting by jets of water E21C25/60; blasting by explosives F42D)
E21C37/12 (By injecting into the borehole a liquid, either initially at high pressure) appears on 63 US grants and 33 published applications in this corpus.
Search patents in E21C- Granted patents
- 63
- Published applications
- 33
- Assignees
- 51
- Inventors
- 209
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 5 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 4 |
| 2018 | 2 | 2 |
| 2019 | 3 | 0 |
| 2020 | 3 | 4 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 5 |
| 2024 | 3 | 2 |
| 2025 | 4 | 5 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and device for preventing rib spalling in high-stress surrounding rock by hydraulic slotting22 Sep 2026US 12,742,388 B2China University of Mining and Technology
- Hydraulic fracturing a rock mass11 Nov 2025US 12,467,359 B2Newcrest Mining Limited
- Detonator support device for charging a blasthole, blasting system, method of preparing a detonator support device, explosive material charging vehicle and data medium16 Sep 2025US 12,416,480 B2Luossavaara-Kiirunavaara AB
- Blasting system and a method of explosive material charging28 Jan 2025US 12,209,852 B2Luossavaara-Kiirunavaara AB
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof7 Jan 2025US 12,188,339 B2China University of Mining and Technology
- System for in situ resource utilization in extraterrestrial environments25 Jun 2026US 2026/0176968 A1Honeybee Robotics, LLC
- Pre-split roof caving method based on collaboration of foam fracturing and blasting for coal mines18 Jun 2026US 2026/0168377 A1Shandong University of Science and Technology
- Enhanced extraction system and method based on ultrasonic excitation and acid fracturing integrated permeability enhancement for coal seam23 Apr 2026US 2026/0110247 A1Chongqing University
- Method for constructing artificial water-conducting channel through pulse hydraulic fracturing of drainage boreholes in roof aquifer20 Nov 2025US 2025/0354488 A1China University of Mining and Technology
- System for in situ resource utilization in extraterrestrial environments23 Oct 2025US 2025/0327404 A1Honeybee Robotics, LLC
Most cited
By later US patents
- Hydraulic fracturing of ore bodies91US 6,123,394 ACommonwealth Scientific and Industrial Research Organisation · 2000
- Method and device for breaking hard compact material37US 4,141,592 AAtlas Copco Aktiebolag · 1979
- Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concrete34US 5,308,149 ASunburst Excavation, Inc. · 1994
- Apparatus for rapidly generating pressure pulses for demolition of rock having reduced pressure head loss and component wear24US 5,000,516 AThe United States of America as represented by the Secretary of the Air Force · 1991
- Cartridge for generating high-pressure gases in a drill hole22US 5,765,923 ASunburst Excavation, Inc. · 1998