C07C 303/28
By reaction of hydroxy compounds with sulfonic acids or derivatives thereof
Official title: by reaction of hydroxy compounds with sulfonic acids or derivatives thereof
C07C303/28 (By reaction of hydroxy compounds with sulfonic acids or derivatives thereof) appears on 191 US grants and 217 published applications in this corpus.
Search patents in C07C- Granted patents
- 191
- Published applications
- 217
- Assignees
- 178
- Inventors
- 706
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 4 |
| 2002 | 14 | 5 |
| 2003 | 4 | 12 |
| 2004 | 3 | 6 |
| 2005 | 7 | 7 |
| 2006 | 2 | 7 |
| 2007 | 2 | 8 |
| 2008 | 7 | 5 |
| 2009 | 6 | 6 |
| 2010 | 3 | 12 |
| 2011 | 1 | 7 |
| 2012 | 3 | 4 |
| 2013 | 6 | 10 |
| 2014 | 6 | 6 |
| 2015 | 9 | 6 |
| 2016 | 8 | 16 |
| 2017 | 6 | 10 |
| 2018 | 14 | 14 |
| 2019 | 8 | 11 |
| 2020 | 11 | 11 |
| 2021 | 7 | 12 |
| 2022 | 8 | 6 |
| 2023 | 4 | 12 |
| 2024 | 2 | 8 |
| 2025 | 7 | 5 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cannabinoid analogs, formulations, and methods of use24 Mar 2026US 12,583,832 B2Nalu Bio, Inc.
- Bissulfonate compound, preparation method therefor, electrolyte solution and energy storage device17 Mar 2026US 12,580,227 B2Guangzhou Tinci Materials Technology Co., Ltd.
- Process for the preparation of 6-(cyclopropaneamido)-4-((2-methoxy-3-(1-methyl-1H-1,2,4-triazol-3-yl)phenyl)amino)-N-(methyl-d3)pyridazine-3-carboxamide3 Mar 2026US 12,565,487 B2Bristol-Myers Squibb Company
- Crystal form of 6-(cyclopropanecarboxamido)-4-((2-methoxy-3-(1-methyl-1H-1,2,4-triazol-3-yl)phenyl)amino)-n-(methyl-d3) pyridazine-3-carboxamide10 Feb 2026US 12,545,665 B2Bristol-Myers Squibb Company
- Process of making 3-(4′-aminophenyl)-2-methoxypropionic acid, and analogs and intermediates thereof30 Dec 2025US 12,509,416 B2Nogra Pharma Limited
- Emulsifier and preparation method therefor, and oil-based drilling fluid1 Oct 2026US 2026/0297414 A1China Petroleum & Chemical Corporation
- Method for producing very-long-chain polyunsaturated fatty acid27 Aug 2026US 2026/0250228 A1Nissui Corporation
- Process for the preparation of 6-(cyclopropaneamido)-4-((2-methoxy-3-(1-methyl-1h-1,2,4-triazol-3-yl)phenyl)amino)-n-(methyl-d3)pyridazine-3-carboxamide18 Jun 2026US 2026/0167628 A1Bristol-Myers Squibb Company
- Method and compound useful in preparation of orexin-2 receptor antagonist, and lemborexant having few impurities19 Feb 2026US 2026/0049069 A1Eisai R&D Management Co., Ltd.
- Two-dimensional covalent organic frameworks for harvesting mechanical energy12 Feb 2026US 2026/0042725 A1City University of Hong Kong
Most cited
By later US patents
- Methods of chemical systhesis of phenolic nitrogen mustard prodrugs59US 6,916,949 B2Cancer Research Technology Limited · 2005
- Process for converting lower alkanes to esters42US 5,233,113 ACatalytica, Inc. · 1993
- Catalytic process for converting lower alkanes to esters, alcohols, and to hydrocarbons39US 5,306,855 ACatalytica, Inc. · 1994
- Selective sulphonation of the primary alcohol of a diol containing both primary and secondary alcohols25US 6,194,586 B1Eli Lilly and Company · 2001
- Process for preparing substituted 5-fluoro-1H-pyrazolopyridines18US 8,802,847 B2Bayer Intellectual Property GmbH · 2014