E21B 43/285
Melting minerals
Official title: Melting minerals, e.g. sulfur (E21B43/24 takes precedence)
E21B43/285 (Melting minerals) appears on 20 US grants and 7 published applications in this corpus.
Search patents in E21B- Granted patents
- 20
- Published applications
- 7
- Assignees
- 15
- Inventors
- 62
- Latest grant
- 1 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Production of hydrocarbon using direct-contact steam generation1 Feb 2022US 11,236,594 B2Suncor Energy Inc.
- High-power microwave borehole fracturing device for engineering rock mass8 Dec 2020US 10,858,910 B2Northeastern University
- Production of hydrocarbon using direct-contact steam generation1 Dec 2020US 10,851,630 B2Suncor Energy Inc.
- Selectively corrodible downhole article and method of use30 Jun 2015US 9,068,428 B2Baker Hughes Incorporated
- Method and device for excavating submerged stratum28 Sep 2010US 7,802,384 B2Japan Drilling Co., Ltd.
- Gas-fired steam-injection boiler for oil field24 Oct 2024US 2024/0353095 A1China Petroleum & Chemical Corporation
- Production of hydrocarbon using direct-contact steam generation28 Jan 2021US 2021/0025266 A1Suncor Energy Inc.
- High-power microwave borehole fracturing device for engineering rock mass6 Feb 2020US 2020/0040717 A1Northeastern University
- Production of hydrocarbon using direct-contact steam generation29 Mar 2018US 2018/0087354 A1Suncor Energy Inc.
- System and method for thermally treating a subsurface formation by a heated molten salt mixture17 Sep 2015US 2015/0260023 A1Genie IP B.V.
Most cited
By later US patents
- Exploitation method for reservoirs containing hydrogen sulphide117US 4,988,389 A1991
- Electric induction heating of underground ore deposits50US 3,988,036 A1976
- Method and device for excavating submerged stratum40US 7,802,384 B2Japan Drilling Co., Ltd. · 2010
- Selectively corrodible downhole article and method of use31US 9,068,428 B2Baker Hughes Incorporated · 2015
- Apparatus for recovering gaseous hydrocarbons from hydrocarbon-containing solid hydrates30US 4,424,858 AThe United States of America as represented by the United States Department of Energy · 1984