E21B 43/2401
By means of electricity
Official title: {by means of electricity}
E21B43/2401 (By means of electricity) appears on 778 US grants and 749 published applications in this corpus.
Search patents in E21B- Granted patents
- 778
- Published applications
- 749
- Assignees
- 205
- Inventors
- 948
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 18 | 0 |
| 1985 | 13 | 0 |
| 1986 | 10 | 0 |
| 1987 | 11 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 9 | 0 |
| 1993 | 5 | 0 |
| 1994 | 9 | 0 |
| 1995 | 8 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 76 |
| 2003 | 9 | 47 |
| 2004 | 47 | 14 |
| 2005 | 26 | 16 |
| 2006 | 37 | 9 |
| 2007 | 6 | 31 |
| 2008 | 15 | 26 |
| 2009 | 24 | 36 |
| 2010 | 18 | 36 |
| 2011 | 13 | 34 |
| 2012 | 25 | 30 |
| 2013 | 29 | 36 |
| 2014 | 39 | 65 |
| 2015 | 43 | 61 |
| 2016 | 49 | 36 |
| 2017 | 32 | 31 |
| 2018 | 34 | 17 |
| 2019 | 22 | 30 |
| 2020 | 30 | 28 |
| 2021 | 24 | 23 |
| 2022 | 22 | 20 |
| 2023 | 13 | 14 |
| 2024 | 24 | 17 |
| 2025 | 13 | 13 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Extraction from a formation with induction heating16 Jun 2026US 12,655,732 B2Joslyn Energy Development Incorporated
- Method and system for oil recovery using solvent-assisted electric heating16 Jun 2026US 12,655,733 B2
- Gaseous hydrocarbons formation heating device19 May 2026US 12,631,098 B2King Fahd University of Petroleum and Minerals
- Fluid injection for dehydrogenation14 Apr 2026US 12,601,243 B2Saudi Arabian Oil Company
- Downhole apparatus and system for electric-based fracturing24 Mar 2026US 12,584,392 B2Eden GeoPower, Inc.
- Method for synergistic permeability enhancement and extraction of coal mine gas23 Jul 2026US 2026/0210224 A1Chongqing University
- Energized Connectivity Completions Technology25 Jun 2026US 2026/0176941 A1
- In situ leach mining using electrical reservoir stimulation18 Jun 2026US 2026/0168369 A1Eden GeoPower, Inc.
- Systems and methods for hydrogen production from an underground formation4 Dec 2025US 2025/0369333 A1Saudi Arabian Oil Company
- Systems and methods for generating signals27 Nov 2025US 2025/0364921 A1Acceleware Ltd.
Most cited
By later US patents
- In-situ tuned microwave oil extraction process483US 5,082,054 A1992
- Method for in situ heat processing of hydrocarbonaceous formations474US 4,140,180 AIIT Research Institute · 1979
- Apparatus and method for in situ heat processing of hydrocarbonaceous formations456US 4,144,935 AIIT Research Institute · 1979
- Self-regulating heater utilizing ferrite-type body449US 5,182,427 AMetcal, Inc. · 1993
- Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale443US 5,236,039 AGeneral Electric Company · 1993