B01J 2540/32
Sulfonic acid groups or their salts
B01J2540/32 (Sulfonic acid groups or their salts) appears on 74 US grants and 40 published applications in this corpus.
Search patents in B01J- Granted patents
- 74
- Published applications
- 40
- Assignees
- 50
- Inventors
- 181
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 3 |
| 2003 | 1 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 3 |
| 2014 | 2 | 0 |
| 2015 | 3 | 1 |
| 2016 | 1 | 5 |
| 2017 | 2 | 2 |
| 2018 | 1 | 4 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 9 |
| 2023 | 1 | 0 |
| 2024 | 1 | 3 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrogen storage based on aqueous formate- bicarbonate (hydrogen carbonate) equilibrium9 Jun 2026US 12,649,654 B2Hydrogen Revolution Hungary Kft.
- Hydrogenation process of oxime derivatives9 Dec 2025US 12,491,503 B2Syngenta Crop Protection AG
- Process for reducing by-products in bisphenol A reaction system1 Jul 2025US 12,344,575 B1Tianjin University
- Catalysts for the transformation of carbon dioxide and glycerol to formic acid and lactic acid and methods of making the same14 Jan 2025US 12,194,448 B2The George Washington University
- Method for oxidation of sulfur-containing compounds5 Nov 2024US 12,134,593 B2WiSys Technology Foundation, Inc.
- Hydrogen storage based on aqueous formate-bicarbonate (hydrogen carbonate) equilibrium3 Oct 2024US 2024/0327207 A1Geomax Project Kft.
- Cobalt catalysts containing "smart" or "task specific" anions8 Aug 2024US 2024/0261770 A1The Texas A&M University System
- Quantum dot sensitized photoreduction of carbon dioxide25 Apr 2024US 2024/0132362 A1Northwestern University
- Heterogeneous catalysts, and uses thereof8 Sep 2022US 2022/0280928 A1Novomer, Inc.
- Method of using metal organic framework14 Apr 2022US 2022/0111370 A1Phillips 66 Company
Most cited
By later US patents
- Polymerization of carbon monoxide/olefin with P ligand having polar aryl group101US 4,843,144 AShell Oil Company · 1989
- Process of telomerizing conjugated dienes34US 6,525,228 B2Celanese Chemicals Europe GmbH · 2003
- Selective ring-opening cross-metathesis of cycloolefins34US 6,803,429 B2California Institute of Technology · 2004
- Catalytic process32US 4,399,312 AJohnson Matthey Public Limited Company · 1983
- Mesoporous crystalline acid composition of a diphosphonate-phosphite of a tetravalent metal which can be used as a catalyst27US 5,892,080 AEniricerche S. p. A. · 1999