C07C 53/12
Acetic anhydride
Official title: Acetic anhydride (ketene C07C49/90)
C07C53/12 (Acetic anhydride) appears on 8 US grants and 9 published applications in this corpus.
Search patents in C07C- Granted patents
- 8
- Published applications
- 9
- Assignees
- 7
- Inventors
- 26
- Latest grant
- 27 Jan 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 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hexylamine salts and methods of using hexylamine27 Jan 2026US 12,533,327 B2ThermoLife International, LLC
- Hexylamine salts and methods of using hexylamine9 Dec 2025US 12,491,168 B2ThermoLife International, LLC
- Highly accurate de novo polynucleotide synthesis15 Jul 2025US 12,357,959 B2Twist Bioscience Corporation
- Hexylamine salts and methods of using hexylamine24 Dec 2024US 12,171,730 B2ThermoLife International, LLC
- Hexylamine salts and methods of using hexylamine3 Jan 2023US 11,541,020 B2ThermoLife International, LLC
- Integrated process for generating acid anhydrides18 Jun 2026US 2026/0167596 A1Cleantech Building Materials PLC
- Highly accurate de novo polynucleotide synthesis20 Nov 2025US 2025/0352972 A1Twist Bioscience Corporation
- Hexylamine salts and methods of using hexylamine18 Jan 2024US 2024/0016764 A1ThermoLife International, LLC
- Hexylamine salts and methods of using hexylamine25 May 2023US 2023/0157976 A1ThermoLife International, LLC
- Hexylamine salts and methods of using hexylamine18 May 2023US 2023/0149325 A1ThermoLife International, LLC
Most cited
By later US patents
- Process for preparing carboxylic acid anhydrides44US 4,115,444 AHalcon International, Inc. · 1978
- Processes for purifying acetic anhydride5US 8,759,576 B2Celanese International Corporation · 2014
- Process for the preparation of acetic anhydride from methyl formate2US 5,214,205 ASollac, A French Body Corporate · 1993
- Hexylamine salts and methods of using hexylamine1US 11,541,020 B2ThermoLife International, LLC · 2023