E21C 25/60
Slitting by jets of water or other liquid
Official title: Slitting by jets of water or other liquid (picks with arrangement of fluid-spraying nozzles E21C35/187; distribution of spraying fluids in rotating cutter-heads E21C35/23)
E21C25/60 (Slitting by jets of water or other liquid) appears on 86 US grants and 18 published applications in this corpus.
Search patents in E21C- Granted patents
- 86
- Published applications
- 18
- Assignees
- 44
- Inventors
- 165
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 2 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mining vehicle for cobalt-rich crust from the seabed11 Aug 2026US 12,704,066 B2Qingdao University of Science and Technology
- Method and device for horizontal bore mining5 May 2026US 12,618,308 B2Iluka Resources Limited
- Integrated mining method of coal breaking, coal extraction and water circulation in U-well and system thereof4 Mar 2025US 12,241,371 B1China University of Mining and Technology, Beijing
- 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 and method of controlling single or dual pump operation5 Dec 2023US 11,834,940 B1Halliburton Energy Services.Inc.
- Intelligent adaptive monitoring and control system for high-pressure jet excavation23 Jul 2026US 2026/0210246 A1Chongqing University
- Mining vehicle for cobalt-rich crust from the seabed31 Jul 2025US 2025/0243757 A1Qingdao University of Science and Technology
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof28 Nov 2024US 2024/0392669 A1China University of Mining and Technology
- Method and device for horizontal bore mining7 Nov 2024US 2024/0368969 A1Iluka Resources Limited
- Mining machine applicable to fluidized mining of ore bodies and mining method14 Oct 2021US 2021/0317739 A1China University of Mining and Technology, Beijing
Most cited
By later US patents
- Enhancing liquid jet erosion147US 4,474,251 AHydronautics, Incorporated · 1984
- Horizontal remote mining system, and method120US 5,879,057 AAmvest Corporation · 1999
- Apparatus and process for employing synergistic destructive powers of a water stream and a laser beam102US 5,356,081 AElectric Power Research Institute, Inc. · 1994
- Enhancing liquid jet erosion91US 4,389,071 AHydronautics, Incorporated · 1983
- Enhancing liquid jet erosion86US 4,681,264 AHydronautics, Incorporated · 1987