C01B 17/501
By reduction of sulfur compounds
Official title: {by reduction of sulfur compounds}
C01B17/501 (By reduction of sulfur compounds) appears on 59 US grants and 35 published applications in this corpus.
Search patents in C01B- Granted patents
- 59
- Published applications
- 35
- Assignees
- 62
- Inventors
- 156
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 3 |
| 2015 | 3 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 2 |
| 2018 | 3 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 3 |
| 2024 | 0 | 2 |
| 2025 | 1 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrated method for the commercial and industrial utilisation of calcium sulphate whilst obtaining rare earth elements from the production of phosphoric acid28 Apr 2026US 12,612,309 B2thyssenkrupp AG
- Method for producing phosphoric acid and calcium sulphate quality suitable for a clinker process for the commercial and industrial utilization of calcium sulphate24 Mar 2026US 12,583,747 B2thyssenkrupp AG
- Resource recovery method and resource recovery system of desulfurized ash16 Sep 2025US 12,415,213 B2Hangsu Shagang Group Co., Ltd.
- Integrated method for producing sulphur dioxide quality suitable for a sulphuric acid process from calcium sulphate/phosphogypsum from phosphoric acid production19 Dec 2023US 11,845,657 B2thyssenkrupp AG
- Process for managing hydrogen sulfide in a refinery25 Jul 2023US 11,708,267 B2Uop LLC
- Process and plant for a permanent storage of phosphogypsum14 May 2026US 2026/0132042 A1Metso Metals Oy
- Strong gas process and apparatus for sulfuric acid production5 Jun 2025US 2025/0178899 A1Noram Engineering and Constructors Ltd.
- Method for microwave-enhanced carbon reduction of waste sulfuric acid5 Jun 2025US 2025/0178900 A1Institute of Process Engineering, CAS
- Methods and systems for efficiently and cleanly manufacturing ammonia, ammonium sulfate, nitric acid, ammonium nitrate, or combinations thereof from coal and petcoke products9 May 2024US 2024/0150189 A1Decarbtek Global Corp.
- Resource recovery method and resource recovery system of desulfurized ash28 Mar 2024US 2024/0100579 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co., Ltd.
Most cited
By later US patents
- Method and apparatus for producing a product in a regenerator furnace from impure waste containing a non-gasifiable impurity110US 5,640,709 AMolten Metal Technology, Inc. · 1997
- Method and apparatus for producing a product in a regenerator furnace from impure waste containing a non-gasifiable impurity108US 5,640,706 AMolten Metal Technology, Inc. · 1997
- Method for removing acid gases from flue gas58US 6,126,910 A2000
- Process for producing cement from a flue gas desulfurization process waste product51US 5,766,339 ADravo Lime Company · 1998
- Process for the treatment of waste streams21US 6,958,136 B2Manufacturing and Technology Conversion International, Inc. · 2005