C07C 51/347
Preparation of carboxylic acids or their salts, halides or anhydrides: by reactions
Official title: by reactions not involving formation of carboxyl groups
C07C51/347 (Preparation of carboxylic acids or their salts, halides or anhydrides: by reactions) appears on 2,086 US grants and 1,331 published applications in this corpus.
Search patents in C07C- Granted patents
- 2,086
- Published applications
- 1,331
- Assignees
- 897
- Inventors
- 4,574
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 46 | 0 |
| 1977 | 29 | 0 |
| 1978 | 54 | 0 |
| 1979 | 40 | 0 |
| 1980 | 51 | 0 |
| 1981 | 40 | 0 |
| 1982 | 56 | 0 |
| 1983 | 47 | 0 |
| 1984 | 41 | 0 |
| 1985 | 51 | 0 |
| 1986 | 38 | 0 |
| 1987 | 34 | 0 |
| 1988 | 54 | 0 |
| 1989 | 46 | 0 |
| 1990 | 44 | 0 |
| 1991 | 46 | 0 |
| 1992 | 37 | 0 |
| 1993 | 55 | 0 |
| 1994 | 36 | 0 |
| 1995 | 35 | 0 |
| 1996 | 24 | 0 |
| 1997 | 29 | 0 |
| 1998 | 43 | 0 |
| 1999 | 33 | 0 |
| 2000 | 26 | 0 |
| 2001 | 48 | 3 |
| 2002 | 43 | 25 |
| 2003 | 19 | 51 |
| 2004 | 33 | 43 |
| 2005 | 34 | 45 |
| 2006 | 29 | 37 |
| 2007 | 21 | 33 |
| 2008 | 32 | 42 |
| 2009 | 22 | 32 |
| 2010 | 16 | 48 |
| 2011 | 32 | 50 |
| 2012 | 31 | 46 |
| 2013 | 39 | 92 |
| 2014 | 73 | 92 |
| 2015 | 79 | 87 |
| 2016 | 83 | 88 |
| 2017 | 71 | 79 |
| 2018 | 80 | 79 |
| 2019 | 63 | 55 |
| 2020 | 53 | 53 |
| 2021 | 38 | 49 |
| 2022 | 32 | 37 |
| 2023 | 25 | 43 |
| 2024 | 19 | 52 |
| 2025 | 17 | 41 |
| 2026 | 19 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 51/377By splitting-off hydrogen or functional groups657
- C07C 51/353By isomerisation476
- C07C 51/367By introduction of functional groups containing oxygen only in singly bound form441
- C07C 51/36By hydrogenation of carbon-to-carbon unsaturated bonds275
- C07C 51/363By introduction of halogen213
- C07C 51/373By introduction of functional groups containing oxygen only in doubly bound form153
Recent patents
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- Hydrogenation catalysts and method for benzoic acid hydrogenation reaction29 Sep 2026US 12,746,534 B2Hunan Changlian New Material Technology Co., Ltd.
- Tautomeric ligand enables biomimetic C—H hydroxylation with molecular oxygen22 Sep 2026US 12,741,937 B2The Scripps Research Institute
- Ether carboxylic acid composition25 Aug 2026US 12,715,834 B2Kao Chemicals GmbH
- Method for preparation of 1, 4-cyclohexanedimethanol23 Jun 2026US 12,662,439 B2Hanwha Solutions Corporation
- Organic Photoredox Catalysts, Compositions, and Conversion Processes24 Sep 2026US 2026/0284647 A1Colorado State University Research Foundation
- Isomerization of cyclohexenedicarboxylic acid and its derivatives17 Sep 2026US 2026/0274780 A1Iowa State University Research Foundation, Inc.
- Method for producing very-long-chain polyunsaturated fatty acid27 Aug 2026US 2026/0250228 A1Nissui Corporation
- Process27 Aug 2026US 2026/0250230 A1Givaudan SA
- Method for preparing pyridine oxynitride compound20 Aug 2026US 2026/0242339 A1Shanghai Jemincare Pharmaceutical Co., Ltd.
Most cited
By later US patents
- Organometallic fluorenyl compounds, preparation, and use147US 5,436,305 APhillips Petroleum Company · 1995
- Hydrogenated naphthalenes137US 4,391,731 AHoffmann-La Roche Inc. · 1983
- Ether carboxylate detergent builders and process for their preparation128US 4,663,071 AThe Procter & Gamble Company · 1987
- Olefin metathesis coupling using ruthenium and osmium carbene complexes113US 5,750,815 ACalifornia Institute of Technology · 1998
- Process for the treatment of acne112US 4,386,104 A1983