C01B 17/58
Recovery of sulfur dioxide from acid tar or the like or from
Official title: Recovery of sulfur dioxide from acid tar or the like {or from any waste sulfuric acid}
C01B17/58 (Recovery of sulfur dioxide from acid tar or the like or from) appears on 40 US grants and 20 published applications in this corpus.
Search patents in C01B- Granted patents
- 40
- Published applications
- 20
- Assignees
- 36
- Inventors
- 93
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 2 | 2 |
| 2010 | 1 | 4 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 2 | 2 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process and redox furnace for acid regeneration17 Mar 2026US 12,577,103 B2Messer Industries USA, Inc.
- Process and apparatus for acid regeneration1 Apr 2025US 12,264,066 B2Messer Industries USA, Inc.
- Method for preparing electronic grade sulfuric acid from waste sulfuric acid solution1 Aug 2023US 11,713,247 B2Green Advanced Technology Ltd.
- Process for the production of sulfur trioxide5 May 2020US 10,640,376 B2Haldor Topsoe A/S
- Plasma whirl reactor apparatus and methods of use8 Sep 2015US 9,127,205 B2Foret Plasma Labs, LLC
- Process and apparatus for acid regeneration26 Jun 2025US 2025/0206611 A1Messer Industries USA, Inc.
- Hydrogen production by electrochemical decomposition of saline water using sulfur dioxide or bisulfite as an anode depolarizer9 Jan 2025US 2025/0011944 A1Hys Energy Ltd
- Process and redox furnace for acid regeneration24 Oct 2024US 2024/0351878 A1Messer Industries USA, Inc.
- Process and apparatus for acid regeneration26 Oct 2023US 2023/0339752 A1Messer Industries USA, Inc.
- Method for preparing electronic grade sulfuric acid from waste sulfuric acid solution24 Nov 2022US 2022/0371890 A1Green Advanced Technology Ltd.
Most cited
By later US patents
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Plasma whirl reactor apparatus and methods of use43US 8,324,523 B2Foret Plasma Labs, LLC · 2012
- Plasma whirl reactor apparatus and methods of use30US 8,357,873 B2Foret Plasma Labs, LLC · 2013
- Process for removing hydrogen sulfide from contaminated gas14US 3,959,452 AMobil Oil Corporation · 1976
- Process for preparing sulfur dioxide14US 4,010,246 AHoechst Aktiengesellschaft · 1977