E21C 45/00
Methods of hydraulic mining
Official title: Methods of hydraulic mining; Hydraulic monitors (E21C25/60 takes precedence)
E21C45/00 (Methods of hydraulic mining) appears on 32 US grants and 26 published applications in this corpus.
Search patents in E21C- Granted patents
- 32
- Published applications
- 26
- Assignees
- 32
- Inventors
- 100
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 4 |
| 2005 | 2 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 2 | 4 |
| 2017 | 2 | 2 |
| 2018 | 1 | 0 |
| 2019 | 3 | 1 |
| 2020 | 0 | 2 |
| 2021 | 3 | 2 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Millimeter-wave directed-energy excavation15 Sep 2026US 12,735,985 B2Massachusetts Institute of Technology
- Methods for reducing sediment plume in deepsea nodule mining5 Mar 2024US 11,920,471 B2Deep Reach Technoloy, Inc.
- Hydraulic hoisting of potash and other evaporite ores22 Mar 2022US 11,280,193 B2Stantec Consulting Ltd.
- Electrodischarge apparatus23 Nov 2021US 11,179,732 B2VLN Advanced Technologies Inc.
- Simulation test method for gas extraction from tectonically-deformed coal seam in-situ by depressurizing horizontal well cavity4 May 2021US 10,995,572 B2Anhui University of Science and Technology
- 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
- Millimeter-Wave Directed-Energy Excavation20 Nov 2025US 2025/0354489 A1Impact Technologies, LLC
- Methods for Reducing Sediment Plume in Deepsea Nodule Mining9 Jun 2022US 2022/0178108 A1Deep Reach Technology, Inc.
- Hydraulic hoisting of potash and other evaporite ores11 Mar 2021US 2021/0071527 A1Stantec Consulting Ltd.
- Mine field layout method suitable for fluidized mining of coal resources7 Jan 2021US 2021/0003008 A1China University of Mining and Technology, Beijing
Most cited
By later US patents
- Method and device for excavating submerged stratum40US 7,802,384 B2Japan Drilling Co., Ltd. · 2010
- Hydraulic mining technique for recovering bitumen from tar sand deposit38US 4,212,353 ATexaco Inc. · 1980
- Vortex injection dredging apparatus and method29US 4,409,746 AConoco Inc. · 1983
- Remotely sensing of excavation cavity during mining24US 4,708,395 AConoco Inc. · 1987
- Apparatus and process for hydraulic mining17US 4,035,023 AFreeport Minerals Corporation · 1977