E21B 43/28
Dissolving minerals other than hydrocarbons
Official title: Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent (E21B43/241 takes precedence)
E21B43/28 (Dissolving minerals other than hydrocarbons) appears on 504 US grants and 327 published applications in this corpus.
Search patents in E21B- Granted patents
- 504
- Published applications
- 327
- Assignees
- 201
- Inventors
- 892
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 16 | 0 |
| 1978 | 20 | 0 |
| 1979 | 9 | 0 |
| 1980 | 27 | 0 |
| 1981 | 23 | 0 |
| 1982 | 24 | 0 |
| 1983 | 24 | 0 |
| 1984 | 18 | 0 |
| 1985 | 13 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 11 |
| 2004 | 3 | 2 |
| 2005 | 5 | 2 |
| 2006 | 8 | 4 |
| 2007 | 1 | 12 |
| 2008 | 3 | 3 |
| 2009 | 11 | 14 |
| 2010 | 2 | 5 |
| 2011 | 6 | 13 |
| 2012 | 7 | 7 |
| 2013 | 7 | 20 |
| 2014 | 10 | 19 |
| 2015 | 14 | 26 |
| 2016 | 19 | 19 |
| 2017 | 15 | 12 |
| 2018 | 12 | 16 |
| 2019 | 17 | 10 |
| 2020 | 5 | 19 |
| 2021 | 17 | 17 |
| 2022 | 13 | 17 |
| 2023 | 20 | 21 |
| 2024 | 18 | 25 |
| 2025 | 20 | 18 |
| 2026 | 21 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for generation of hydrogen by in-situ (subsurface) serpentinization and carbonization of mafic or ultramafic rock25 Aug 2026US 12,716,336 B2Ohio State Innovation Foundation
- Using electrical reservoir stimulation to engineer a geologic battery for long-term energy storage and hydrogen generation18 Aug 2026US 12,709,969 B2Eden GeoPower, Inc.
- Viscoelastic surfactant formulations and use in subterranean formations11 Aug 2026US 12,703,821 B2Energy Solutions (US) LLC
- Method and system to create a tortuous flow path28 Jul 2026US 12,692,771 B2Schlumberger Technology Corporation
- Flexible electrode tube for electrified rare earth mining and application method therefor21 Jul 2026US 12,687,112 B2Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
- Method for leaching rock metal component, method for storing carbon dioxide underground, and method for fixing carbon dioxide17 Sep 2026US 2026/0275851 A1Tohoku University
- Fracturing Hot Rock17 Sep 2026US 2026/0276245 A1
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Method and system to create a tortuous flow path23 Jul 2026US 2026/0210217 A1Schlumberger Technology Corporation
- In situ leach mining using electrical reservoir stimulation18 Jun 2026US 2026/0168369 A1Eden GeoPower, Inc.
Most cited
By later US patents
- In situ thermal processing of a relatively permeable formation while controlling pressure306US 7,096,942 B1Shell Oil Company · 2006
- Method of in-situ hydrogenation of carbonaceous material299US 4,501,445 ACities Service Company · 1985
- In situ solution mining of coal285US 3,973,628 ANew Mexico Tech Research Foundation · 1976
- Serially burning and pyrolyzing to produce shale oil from a subterranean oil shale269US 3,987,851 AShell Oil Company · 1976
- In situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore232US 6,964,300 B2Shell Oil Company · 2005