C07C 253/22
Preparation of carboxylic acid nitriles: by reaction of ammonia with carboxylic acids
Official title: by reaction of ammonia with carboxylic acids with replacement of carboxyl groups by cyano groups
C07C253/22 (Preparation of carboxylic acid nitriles: by reaction of ammonia with carboxylic acids) appears on 45 US grants and 43 published applications in this corpus.
Search patents in C07C- Granted patents
- 45
- Published applications
- 43
- Assignees
- 40
- Inventors
- 116
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 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 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 5 |
| 2014 | 5 | 4 |
| 2015 | 4 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 3 |
| 2020 | 0 | 2 |
| 2021 | 3 | 8 |
| 2022 | 3 | 2 |
| 2023 | 5 | 2 |
| 2024 | 2 | 3 |
| 2025 | 2 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for producing nitriles11 Aug 2026US 12,703,676 B2Alliance for Energy Innovation, LLC
- Method for nitrilation reaction of acrylic acid ester7 Jul 2026US 12,673,916 B2Hyundai Motor Company
- Systems and methods for producing nitriles29 Apr 2025US 12,286,390 B2Alliance for Sustainable Energy, LLC
- High purity 2-naphthylacetonitrile and method for producing same7 Jan 2025US 12,187,664 B2Api Corporation
- High purity 2-naphthylacetonitrile and method for producing same10 Sep 2024US 12,084,404 B2Api Corporation
- Method for nitrilation reaction of acrylic acid ester8 Oct 2026US 2026/0308117 A1Hyundai Motor Company
- Acetonitrile compositions and methods of making the same16 Jul 2026US 2026/0200835 A1Nitto Denko Corporation
- Acetonitrile compositions and methods of making the same23 Apr 2026US 2026/0109666 A1Safion Renewables Inc.
- Recycled content organic chemical compounds from waste plastic5 Feb 2026US 2026/0035324 A1Eastman Chemical Company
- Systems and methods for producing nitriles31 Jul 2025US 2025/0243153 A1Alliance for Sustainable Energy, LLC
Most cited
By later US patents
- Process for the preparation of aliphatic nitriles10US 6,005,134 AKao Corporation · 1999
- High purity 2-naphthylacetonitrile and method for producing same5US 11,643,386 B2Api Corporation · 2023
- Process for the manufacture of fatty acid nitriles and glycerol from glycerides, especially from natural fats and oils5US 4,234,509 AHoechst Aktiengesellschaft · 1980
- Process for the preparation of fatty acid nitriles and glycerol from glycerides5US 4,801,730 AHoechst Aktiengesellschaft · 1989
- Preparation of aliphatic dinitriles4US 4,743,702 ABASF SE · 1988