E21C 41/24
For oil-bearing deposits
Official title: for oil-bearing deposits
E21C41/24 (For oil-bearing deposits) appears on 226 US grants and 25 published applications in this corpus.
Search patents in E21C- Granted patents
- 226
- Published applications
- 25
- Assignees
- 50
- Inventors
- 198
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 17 | 0 |
| 1978 | 21 | 0 |
| 1979 | 32 | 0 |
| 1980 | 31 | 0 |
| 1981 | 25 | 0 |
| 1982 | 8 | 0 |
| 1983 | 21 | 0 |
| 1984 | 31 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 4 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Underground drilling rig and method for erecting same15 Apr 2025US 12,276,193 B2Bentec GmbH Drilling & Oilfield Systems
- Production of hydrocarbon using direct-contact steam generation1 Feb 2022US 11,236,594 B2Suncor Energy Inc.
- Production of hydrocarbon using direct-contact steam generation1 Dec 2020US 10,851,630 B2Suncor Energy Inc.
- Method of drilling vertical and horizontal pathways to mine for solid natural resources30 Jun 2020US 10,697,244 B2
- Method of mining using a laser5 Mar 2019US 10,221,687 B2Merger Mines Corporation
- Underground drilling rig and method for erecting same29 Sep 2022US 2022/0307373 A1Bentec GmbH Drilling & Oilfield Systems
- Production of hydrocarbon using direct-contact steam generation28 Jan 2021US 2021/0025266 A1Suncor Energy Inc.
- Method of Drilling Vertical and Horizontal Pathways to Mine for Solid Natural Resources15 Aug 2019US 2019/0249493 A1
- Production of hydrocarbon using direct-contact steam generation29 Mar 2018US 2018/0087354 A1Suncor Energy Inc.
- Method of mining using a laser1 Jun 2017US 2017/0152744 A1Merger Mines Corporation
Most cited
By later US patents
- Recovery of hydrocarbons by in situ thermal extraction365US 3,954,140 A1976
- Transient response process for detecting in situ retorting conditions273US 4,457,374 AThe Standard Oil Company · 1984
- Modified in situ retorting of oil shale224US 4,401,163 AThe Standard Oil Company · 1983
- Reduction of shale oil pour point215US 4,437,519 AOccidental Oil Shale, Inc. · 1984
- In situ retorting of oil shale200US 3,950,029 AMobil Oil Corporation · 1976