C07C 51/56
From organic acids, their salts, their esters or their halides
Official title: from organic acids, their salts, their esters {or their halides, e.g. by carboxylation}
C07C51/56 (From organic acids, their salts, their esters or their halides) appears on 260 US grants and 107 published applications in this corpus.
Search patents in C07C- Granted patents
- 260
- Published applications
- 107
- Assignees
- 127
- Inventors
- 457
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 21 | 0 |
| 1981 | 5 | 0 |
| 1982 | 12 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 19 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 5 | 6 |
| 2004 | 1 | 4 |
| 2005 | 5 | 8 |
| 2006 | 6 | 3 |
| 2007 | 6 | 6 |
| 2008 | 2 | 2 |
| 2009 | 5 | 8 |
| 2010 | 6 | 5 |
| 2011 | 5 | 4 |
| 2012 | 3 | 2 |
| 2013 | 5 | 2 |
| 2014 | 5 | 4 |
| 2015 | 2 | 3 |
| 2016 | 3 | 3 |
| 2017 | 1 | 8 |
| 2018 | 6 | 3 |
| 2019 | 3 | 2 |
| 2020 | 4 | 8 |
| 2021 | 8 | 3 |
| 2022 | 1 | 5 |
| 2023 | 1 | 5 |
| 2024 | 6 | 3 |
| 2025 | 4 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integrated process for generating acid anhydrides26 May 2026US 12,637,405 B2Cleantech Building Materials PLC
- Method for producing fatty alcohol esters of hydroxycarboxylic acids22 Jul 2025US 12,365,645 B2KetoLipix Therapeutics GmbH
- Process for generating acid anhydrides15 Jul 2025US 12,358,860 B2Cleantech Building Materials PLC
- Process for the production of peroxyesters4 Feb 2025US 12,215,074 B2Nouryon Chemicals International B. V.
- Process for the production of diacyl peroxides28 Jan 2025US 12,209,065 B2Nouryon Chemicals International B. V.
- Integrated process for generating acid anhydrides10 Sep 2026US 2026/0265171 A1Cleantech Building Materials PLC
- Integrated process for generating acid anhydrides18 Jun 2026US 2026/0167596 A1Cleantech Building Materials PLC
- Process for the preparation of bio-based olefins from primary alcohol5 Mar 2026US 2026/0062361 A1BASF SE
- Catalytic carboxycarbonylation of alkenes to form anhydrides4 Dec 2025US 2025/0368598 A1Eastman Chemical Company
- Process for generating acid anhydrides2 Oct 2025US 2025/0304521 A1Cleantech Building Materials PLC
Most cited
By later US patents
- Formation, purification and recovery of phthalic anhydride253US 4,215,051 AStandard Oil Company (Indiana) · 1980
- Process for the preparation of ethanol from methanol, carbon monoxide _and hydrogen170US 4,497,967 AThe Halcon SD Group, Inc. · 1985
- Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream131US 7,115,772 B2Celanese International Corporation · 2006
- Process for the preparation of ethanol from methanol69US 5,414,161 AKorea Institute of Science and Technology · 1995
- Process for producing vinyl acetate63US 4,843,170 AMitsubishi Gas Chemical Company, Inc. · 1989