C07C 303/22
From sulfonic acids, by reactions not involving the formation of sulfo or
Official title: from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; {from sulfonic halides by reactions not involving the formation of halosulfonyl groups}
C07C303/22 (From sulfonic acids, by reactions not involving the formation of sulfo or) appears on 362 US grants and 283 published applications in this corpus.
Search patents in C07C- Granted patents
- 362
- Published applications
- 283
- Assignees
- 216
- Inventors
- 951
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 7 | 0 |
| 1993 | 10 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 14 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 10 | 0 |
| 2001 | 10 | 1 |
| 2002 | 7 | 7 |
| 2003 | 12 | 6 |
| 2004 | 5 | 14 |
| 2005 | 7 | 7 |
| 2006 | 4 | 8 |
| 2007 | 9 | 6 |
| 2008 | 5 | 7 |
| 2009 | 5 | 15 |
| 2010 | 8 | 11 |
| 2011 | 7 | 7 |
| 2012 | 8 | 15 |
| 2013 | 7 | 13 |
| 2014 | 10 | 11 |
| 2015 | 16 | 8 |
| 2016 | 8 | 13 |
| 2017 | 10 | 9 |
| 2018 | 9 | 16 |
| 2019 | 13 | 23 |
| 2020 | 15 | 8 |
| 2021 | 9 | 23 |
| 2022 | 19 | 17 |
| 2023 | 15 | 16 |
| 2024 | 17 | 6 |
| 2025 | 7 | 12 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for the preparation of diarylmethane dyes and triarylmethane dyes including isosulfan blue22 Sep 2026US 12,741,934 B2Nj Bio, Inc.
- Process for synthesizing triarylmethane sulfone compounds7 Apr 2026US 12,595,228 B2Provepharm Life Solutions
- Bissulfonate compound, preparation method therefor, electrolyte solution and energy storage device17 Mar 2026US 12,580,227 B2Guangzhou Tinci Materials Technology Co., Ltd.
- System and method for efficiently preparing taurine continuously3 Mar 2026US 12,565,472 B2Hubei Grand Life Science and Technology Co., Ltd.
- Sulfonic acid-modified polyisocyanate and preparation method therefor24 Feb 2026US 12,559,453 B2Wanhua Chemical Group Co., Ltd.
- Ammonium styrenesulfonate composition excellent in storage stability, and method for producing same17 Sep 2026US 2026/0274790 A1Sagami Chemical Research Institute
- An improved process for the preparation of intermediates used in the preparation of dasatinib20 Aug 2026US 2026/0242329 A1Ocimum Labs Private Limited
- Crystal form and amorphous form of carebastine p-toluenesulfonate11 Jun 2026US 2026/0159482 A1Chengdu Shibeikang Biomedical Technology Co., Ltd.
- Methods And Intermediates for Preparing 2-[(4-{6-[(4-Cyano-2-fluorobenzyl)oxy]pyridin-2-yl}piperidin-1-yl)methyl]-1-[(2S)-oxetan-2-ylmethyl]-1H-benzimidazole-6-carboxylic acid, 1,3-Dihydroxy-2-(hydroxymethyl)propan-2-amine Salt29 Jan 2026US 2026/0028331 A1Pfizer Inc.
- High-dielectric constant zwitterionic liquids6 Nov 2025US 2025/0340517 A1The Penn State Research Foundation
Most cited
By later US patents
- Preparation of perfluorinated vinyl ethers having a sulfonyl fluoride end-group109US 6,624,328 B13M Innovative Properties Company · 2003
- Fluorination in tubular reactor system57US 5,488,142 AMinnesota Mining and Manufacturing Company · 1996
- Sulfonated estolides and other derivatives of fatty acids, methods of making them, and compositions and processes employing them53US 7,666,828 B2Stepan Company · 2010
- Tubular reactor system for direct fluorination39US 5,578,278 AMinnesota Mining and Manufacturing Company · 1996
- Lewis acid catalyzed conjugated iodofluorination of fluoroolefins38US 5,481,028 AE. I. Du Pont de Nemours and Company · 1996