C01B 17/161
Preparation from elemental sulfur
Official title: {Preparation from elemental sulfur}
C01B17/161 (Preparation from elemental sulfur) appears on 40 US grants and 40 published applications in this corpus.
Search patents in C01B- Granted patents
- 40
- Published applications
- 40
- Assignees
- 31
- Inventors
- 121
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 3 | 5 |
| 2011 | 5 | 3 |
| 2012 | 0 | 1 |
| 2013 | 3 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 8 |
| 2016 | 4 | 1 |
| 2017 | 5 | 2 |
| 2018 | 1 | 3 |
| 2019 | 1 | 1 |
| 2020 | 3 | 1 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 3 |
| 2025 | 1 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for simultaneous removal of hydrogen sulfide and heavy metals16 Sep 2025US 12,415,726 B2King Fahd University of Petroleum and Minerals
- Hydrogen sulfide production method and sulfur recovery method4 Oct 2022US 11,459,236 B2Sumitomo Chemical Company, Limited
- Thermal stage and reduction absorption sulfur recovery process27 Sep 2022US 11,453,588 B2Saudi Arabian Oil Company
- System for generating H2S in an alkaline medium and method of using the same25 May 2021US 11,014,808 B2Clean Resources Pte. Ltd
- Processes for removing polysulfanes and elemental sulfur from hydrogen sulfide15 Sep 2020US 10,773,958 B2Chevron Phillips Chemical Company LP
- Apparatus for mass-producing lithium sulfide26 Feb 2026US 2026/0054244 A1Lake Technology Limited
- Lithium sulfide production apparatus15 Jan 2026US 2026/0014537 A1Lake Technology Limited
- Comproportionation-based autocatalytic cycles and related methods18 Dec 2025US 2025/0382173 A1Wisconsin Alumni Research Foundation
- Integrated processes utilizing water electrolysis and oxidative dehydrogenation of ethane27 Feb 2025US 2025/0066274 A1Chevron Phillips Chemical Company LP
- Hydrogen sulfide producing device and method for producing hydrogen sulfide7 Nov 2024US 2024/0367973 A1Furukawa Co., Ltd.
Most cited
By later US patents
- Process for preparing hydrogen sulfide14US 3,961,035 AStauffer Chemical Company · 1976
- Process for hydrogen sulfide production12US 4,146,580 AThe Ralph M. Parsons Company · 1979
- Hydrogen sulfide production10US 4,094,961 AThe Ralph M. Parsons Company · 1978
- Hydrocarbon based sulfur solvent systems and methods10US 7,988,767 B2Fluor Technologies Corporation · 2011
- Process for the manufacture of hydrogen sulfide9US 5,173,285 AJgc Corporation · 1992