C07C 253/00
Preparation of carboxylic acid nitriles
Official title: Preparation of carboxylic acid nitriles (of cyanogen or compounds thereof C01C3/00)
C07C253/00 (Preparation of carboxylic acid nitriles) appears on 2,529 US grants and 1,905 published applications in this corpus.
Search patents in C07C- Granted patents
- 2,529
- Published applications
- 1,905
- Assignees
- 978
- Inventors
- 5,461
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 46 | 0 |
| 1977 | 35 | 0 |
| 1978 | 32 | 0 |
| 1979 | 29 | 0 |
| 1980 | 28 | 0 |
| 1981 | 32 | 0 |
| 1982 | 33 | 0 |
| 1983 | 32 | 0 |
| 1984 | 24 | 0 |
| 1985 | 25 | 0 |
| 1986 | 26 | 0 |
| 1987 | 15 | 0 |
| 1988 | 26 | 0 |
| 1989 | 47 | 0 |
| 1990 | 29 | 0 |
| 1991 | 26 | 0 |
| 1992 | 35 | 0 |
| 1993 | 33 | 0 |
| 1994 | 36 | 0 |
| 1995 | 38 | 0 |
| 1996 | 40 | 0 |
| 1997 | 43 | 0 |
| 1998 | 70 | 0 |
| 1999 | 74 | 0 |
| 2000 | 100 | 0 |
| 2001 | 80 | 17 |
| 2002 | 91 | 77 |
| 2003 | 74 | 87 |
| 2004 | 67 | 117 |
| 2005 | 47 | 86 |
| 2006 | 69 | 77 |
| 2007 | 47 | 58 |
| 2008 | 52 | 73 |
| 2009 | 59 | 79 |
| 2010 | 46 | 80 |
| 2011 | 56 | 84 |
| 2012 | 55 | 63 |
| 2013 | 59 | 99 |
| 2014 | 66 | 88 |
| 2015 | 95 | 92 |
| 2016 | 83 | 91 |
| 2017 | 89 | 77 |
| 2018 | 59 | 57 |
| 2019 | 65 | 79 |
| 2020 | 59 | 73 |
| 2021 | 54 | 77 |
| 2022 | 40 | 75 |
| 2023 | 54 | 59 |
| 2024 | 34 | 60 |
| 2025 | 43 | 37 |
| 2026 | 32 | 43 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 253/30Preparation of carboxylic acid nitriles: by reactions not involving the formation of1,179
- C07C 253/24Preparation of carboxylic acid nitriles: by ammoxidation of hydrocarbons or substituted hydrocarbons576
- C07C 253/32Separation316
- C07C 253/08Preparation of carboxylic acid nitriles: by addition of hydrogen cyanide or salts206
- C07C 253/14Preparation of carboxylic acid nitriles: by reaction of cyanides with halogen-containing compounds143
- C07C 253/20Preparation of carboxylic acid nitriles: by dehydration of carboxylic acid amides58
- C07C 253/22Preparation of carboxylic acid nitriles: by reaction of ammonia with carboxylic acids45
- C07C 253/16Preparation of carboxylic acid nitriles: by reaction of cyanides with lactones or31
All 12 subgroupsShow fewer
- C07C 253/18Preparation of carboxylic acid nitriles: by reaction of ammonia or amines with25
- C07C 253/04Preparation of carboxylic acid nitriles: by reaction of cyanogen halides16
- C07C 253/02Preparation of carboxylic acid nitriles: by reaction of nitrogen oxide with organic4
- C07C 253/06From n-formylated amino compounds4
Recent patents
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- Method for manufacturing aromatic nitrile compound25 Aug 2026US 12,715,840 B2Ube Corporation
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- Organic Photoredox Catalysts, Compositions, and Conversion Processes24 Sep 2026US 2026/0284647 A1Colorado State University Research Foundation
- Process for producing isophorone nitrile24 Sep 2026US 2026/0285805 A1Evonik Operations GmbH
- Sustainable preparation of hexamethylene diisocyanate for the production of polyurethane17 Sep 2026US 2026/0274787 A1Covestro Deutschland AG
- Mesoporous nickel powder and preparation method therefor, nickel-phosphorus catalyst system and adiponitrile preparation method3 Sep 2026US 2026/0257212 A1Shandong Nhu Fine Chemical Science and Technology Company Ltd.
Most cited
By later US patents
- Analyte-controlled liquid delivery device and analyte monitor2,000US 5,800,420 AElan Medical Technologies Limited · 1998
- Analyte-controlled liquid delivery device and analyte monitor1,860US 5,807,375 AElan Medical Technologies Limited · 1998
- Analyte-controlled liquid delivery device and analyte monitor1,002US 5,820,622 AElan Medical Technologies Limited · 1998
- System and method for transporting inventory items150US 7,912,574 B2Kiva Systems, Inc. · 2011
- Ligands for metals and improved metal-catalyzed processes based thereon143US 6,307,087 B1Massachusetts Institute of Technology · 2001