F23J 2215/20
Sulfur
Official title: Sulfur; Compounds thereof
F23J2215/20 (Sulfur) appears on 347 US grants and 305 published applications in this corpus.
Search patents in F23J- Granted patents
- 347
- Published applications
- 305
- Assignees
- 218
- Inventors
- 824
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 3 |
| 2002 | 5 | 8 |
| 2003 | 11 | 13 |
| 2004 | 8 | 10 |
| 2005 | 5 | 15 |
| 2006 | 5 | 7 |
| 2007 | 3 | 4 |
| 2008 | 7 | 17 |
| 2009 | 8 | 9 |
| 2010 | 11 | 23 |
| 2011 | 14 | 18 |
| 2012 | 12 | 16 |
| 2013 | 10 | 17 |
| 2014 | 20 | 17 |
| 2015 | 14 | 24 |
| 2016 | 11 | 21 |
| 2017 | 19 | 18 |
| 2018 | 25 | 11 |
| 2019 | 14 | 11 |
| 2020 | 11 | 8 |
| 2021 | 4 | 8 |
| 2022 | 5 | 4 |
| 2023 | 4 | 10 |
| 2024 | 4 | 8 |
| 2025 | 5 | 5 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scrubber for washing exhaust fumes generated by internal combustion engines26 May 2026US 12,636,609 B2Ecospray Technologies S.r.l.
- Industrial solid waste incinerator and flue gas treatment apparatus28 Apr 2026US 12,613,032 B2Zhejiang Weiming Environment Protection Co., Ltd.
- Methods for regenerating a filter medium and cleaning flue gas7 Apr 2026US 12,594,519 B2W. L. Gore & Associates, Inc.
- Method for zero discharge treatment of desulfurization wastewater suitable for multiple working conditions9 Sep 2025US 12,409,414 B2Xi'an Boiler & Environmental Protection Engineering Co., Ltd.
- System and method for desulfurizing and decarbonizing flue gas9 Sep 2025US 12,410,913 B2Huaneng Clean Energy Research Institute
- Combustion system able to operate with recycling of the combustion gas27 Nov 2025US 2025/0362016 A1Carbodown
- Exhaust gas treatment system, power generation facility comprising same, and exhaust gas treatment method2 Oct 2025US 2025/0303358 A1Mitsubishi Heavy Industries, Ltd.
- Method and system for waste-heat recovery4 Sep 2025US 2025/0277625 A1IAF Process Engineering GmbH
- System and method for purification of gasses such as fuel gasses27 Mar 2025US 2025/0101606 A1Danmarks Tekniske Universitet
- Carbon dioxide and sulfur oxide capture and carbon resource conversion system for coal-fired power generation20 Mar 2025US 2025/0090993 A1Lowcarbon Co., Ltd.
Most cited
By later US patents
- Method and apparatus for flue gas cleaning by separation and liquefaction of sulfur dioxide and carbon dioxide127US 5,133,190 A1992
- Flue gas control system of coal combustion boiler and operating method thereof122US 8,071,060 B2Mitsubishi Heavy Industries, Ltd. · 2011
- Integrated injection and bag filter house system for SO.sub.x -NO.sub.x -particulate control with reagent/catalyst regeneration115US 4,793,981 AThe Babcock & Wilcox Company · 1988
- Electrical power generation apparatus104US 8,196,387 B2Praxair Technology, Inc. · 2012
- System and process for removal of pollutants from a gas stream101US 6,610,263 B2EnviroScrub Technologies Corporation · 2003