C07C 51/083
From carboxylic acid anhydrides
Official title: from carboxylic acid anhydrides
C07C51/083 (From carboxylic acid anhydrides) appears on 73 US grants and 68 published applications in this corpus.
Search patents in C07C- Granted patents
- 73
- Published applications
- 68
- Assignees
- 58
- Inventors
- 177
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 5 | 4 |
| 2004 | 0 | 2 |
| 2005 | 2 | 4 |
| 2006 | 2 | 2 |
| 2007 | 2 | 0 |
| 2008 | 0 | 1 |
| 2009 | 2 | 4 |
| 2010 | 2 | 2 |
| 2011 | 3 | 2 |
| 2012 | 0 | 4 |
| 2013 | 2 | 2 |
| 2014 | 1 | 4 |
| 2015 | 4 | 3 |
| 2016 | 3 | 0 |
| 2017 | 1 | 5 |
| 2018 | 4 | 3 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 3 | 3 |
| 2022 | 1 | 10 |
| 2023 | 5 | 2 |
| 2024 | 5 | 1 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrated process for generating acid anhydrides26 May 2026US 12,637,405 B2Cleantech Building Materials PLC
- Free polyunsaturated fatty acid-containing compositions and manufacturing method therefor31 Mar 2026US 12,590,266 B2Nissui Corporation
- Acidic elimination for bio-based aromatics25 Nov 2025US 12,479,787 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Process for generating acid anhydrides15 Jul 2025US 12,358,860 B2Cleantech Building Materials PLC
- 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
- Process for generating acid anhydrides2 Oct 2025US 2025/0304521 A1Cleantech Building Materials PLC
- Maleic anhydride hydrogenation process and succinic acid production process comprising the same6 Feb 2025US 2025/0042867 A1Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
- Free-polyunsaturated-fatty-acid-containing composition and method for manufacturing same2 Jan 2025US 2025/0002808 A1Nissui Corporation
- Free Polyunsaturated Fatty Acid-Containing Compositions and Manufacturing Method Therefor1 Aug 2024US 2024/0254407 A1Nissui Corporation
Most cited
By later US patents
- Preparation of ethyl acetate123US 4,886,905 AEastman Kodak Company · 1989
- Preparation of ethylidene diacetate50US 4,581,473 AEastman Kodak Company · 1986
- Substituted pentacene semiconductors28US 6,864,396 B23M Innovative Properties Company · 2005
- Preparation of .alpha., .beta.-unsaturated carboxylic acids and anhydrides25US 5,710,328 AEastman Chemical Company · 1998
- Felxible method for the common production of formic acid, a carboxylic acid having at least two carbon atoms, and/or the derivatives of the same18US 6,992,212 B2BASF SE · 2006