C01F 11/48
Sulfites
C01F11/48 (Sulfites) appears on 42 US grants and 27 published applications in this corpus.
Search patents in C01F- Granted patents
- 42
- Published applications
- 27
- Assignees
- 30
- Inventors
- 71
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 2 | 4 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 3 | 3 |
| 2022 | 2 | 5 |
| 2023 | 2 | 4 |
| 2024 | 6 | 2 |
| 2025 | 1 | 5 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process to convert reduced sulfur species and water into hydrogen and sulfuric acid28 Apr 2026US 12,612,701 B2California Institute of Technology
- Lime and hydraulic cement manufacture using, hyaloclastite or lava, and method of making and using same6 May 2025US 12,291,488 B2
- Calcium oxide or magnesium oxide production with alkali and sulfur dioxide intermediates24 Dec 2024US 12,172,955 B2Innovator Energy, LLC
- Process to convert reduced sulfur species and water into hydrogen and sulfuric acid8 Oct 2024US 12,110,601 B2California Institute of Technology
- Sodium hydroxide production with carboxylic acid and sulfur dioxide intermediates9 Jul 2024US 12,030,846 B2Innovator Energy, LLC
- Lime and hydraulic cement manufacture using, hyaloclastite or lava, and method of making and using same21 Aug 2025US 2025/0263337 A1Greencraft LLC
- Method of capturing carbon dioxide15 May 2025US 2025/0153098 A1Industrial Technology Research Institute
- Sodium Hydroxide Production with Carboxylic Acid and Sulfur Dioxide Intermediates20 Mar 2025US 2025/0091977 A1Innovator Energy, LLC
- Calcium Oxide or Magnesium Oxide Production with Alkali and Sulfur Dioxide Intermediates16 Jan 2025US 2025/0019336 A1Innovator Energy, LLC
- Lime and hydraulic cement manufacture using, hyaloclastite or lava, and method of making and using same9 Jan 2025US 2025/0011232 A1Greencraft LLC
Most cited
By later US patents
- Method for purifying gases27US 6,187,277 B12001
- Process for production of aqueous hypochlorous acid solution24US 4,017,592 AComprimo B.V. · 1977
- Droplet impingement device21US 4,888,158 AThe Babcock & Wilcox Company · 1989
- Sodium-enhanced lime scrubbing method for removing sulfur dioxide from gaseous streams19US 5,266,285 ADravo Lime Company · 1993
- Addition of organophosphonates for size control of wet calcium-based FGD byproduct solids under inhibited oxidation conditions16US 5,246,679 AElectric Power Research Institute, Inc. · 1993