C07C 253/08
Preparation of carboxylic acid nitriles: by addition of hydrogen cyanide or salts
Official title: by addition of hydrogen cyanide or salts thereof to unsaturated compounds
C07C253/08 (Preparation of carboxylic acid nitriles: by addition of hydrogen cyanide or salts) appears on 206 US grants and 162 published applications in this corpus.
Search patents in C07C- Granted patents
- 206
- Published applications
- 162
- Assignees
- 75
- Inventors
- 403
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 2 |
| 2002 | 6 | 2 |
| 2003 | 6 | 12 |
| 2004 | 6 | 9 |
| 2005 | 7 | 6 |
| 2006 | 6 | 11 |
| 2007 | 1 | 6 |
| 2008 | 7 | 14 |
| 2009 | 7 | 9 |
| 2010 | 11 | 1 |
| 2011 | 7 | 11 |
| 2012 | 4 | 6 |
| 2013 | 5 | 14 |
| 2014 | 5 | 7 |
| 2015 | 17 | 7 |
| 2016 | 10 | 8 |
| 2017 | 6 | 5 |
| 2018 | 8 | 2 |
| 2019 | 3 | 2 |
| 2020 | 3 | 4 |
| 2021 | 1 | 4 |
| 2022 | 2 | 3 |
| 2023 | 0 | 4 |
| 2024 | 3 | 2 |
| 2025 | 2 | 2 |
| 2026 | 5 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Bidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions4 Aug 2026US 12,698,299 B2INV Nylon Chemicals Americas, LLC
- Bidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions21 Jul 2026US 12,686,658 B2INV Nylon Chemicals Americas, LLC
- Manufacture of nitrile compounds16 Jun 2026US 12,655,093 B2Nouryon Chemicals International B. V.
- Bidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions14 Apr 2026US 12,600,737 B2INV Nylon Chemicals Americas, LLC
- Arsenic-containing ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions13 Jan 2026US 12,521,703 B1INV Nylon Chemicals Americas, LLC
- Process for producing isophorone nitrile24 Sep 2026US 2026/0285805 A1Evonik Operations GmbH
- 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.
- Processes for producing nitriles and phosphorus-containing catalysts for use in such processes5 Feb 2026US 2026/0034540 A1INV Nylon Chemicals Americas, LLC
- Bidentate phosphite ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions5 Feb 2026US 2026/0035395 A1INV Nylon Chemicals Americas, LLC
- Arsenic-containing ligands, catalytic compositions containing such ligands, and catalytic processes utilizing such catalytic compositions15 Jan 2026US 2026/0014551 A1INV Nylon Chemicals Americas, LLC
Most cited
By later US patents
- Hydrocyanation process and multidentate phosphite and nickel catalyst composition therefor93US 5,512,696 AE. I. Du Pont de Nemours and Company · 1996
- Promoter synergism in pentenenitrile hydrocyanation69US 4,874,884 AE. I. Du Pont de Nemours and Company · 1989
- Processes and catalyst compositions for hydrocyanation of monoolefins68US 5,688,986 AE. I. Du Pont de Nemours and Company · 1997
- Processes and catalyst compositions for hydrocyanation of monoolefins65US 5,723,641 AE. I. Du Pont de Nemours and Company · 1998
- Hydrocyanation of diolefins and isomerization of nonconjugated 2-alkyl-3-monoalkenenitriles60US 5,821,378 AE. I. Du Pont de Nemours and Company · 1998