C07C 67/18
Preparation of carboxylic acid esters: by conversion of a group containing nitrogen
Official title: by conversion of a group containing nitrogen into an ester group
C07C67/18 (Preparation of carboxylic acid esters: by conversion of a group containing nitrogen) appears on 96 US grants and 88 published applications in this corpus.
Search patents in C07C- Granted patents
- 96
- Published applications
- 88
- Assignees
- 52
- Inventors
- 241
- Latest grant
- 30 Jan 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 2 |
| 2006 | 2 | 3 |
| 2007 | 3 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 6 |
| 2010 | 2 | 10 |
| 2011 | 1 | 6 |
| 2012 | 8 | 4 |
| 2013 | 3 | 6 |
| 2014 | 4 | 5 |
| 2015 | 7 | 3 |
| 2016 | 7 | 6 |
| 2017 | 5 | 7 |
| 2018 | 5 | 4 |
| 2019 | 5 | 4 |
| 2020 | 7 | 8 |
| 2021 | 4 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 2 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Reagents and methods for esterification30 Jan 2024US 11,884,619 B2Wisconsin Alumni Research Foundation
- Process for preparing azelaic acid4 Oct 2022US 11,459,288 B2Corum Inc.
- Method for converting N,N-dialkylamide compound into ester compound using complex of fourth-period transition metal as catalyst5 Jul 2022US 11,377,415 B2Osaka University
- Method of producing methyl methacrylate or methacrylic acid16 Nov 2021US 11,174,215 B2Mitsubishi Chemical UK Limited
- Reagents and methods for esterification17 Aug 2021US 11,091,423 B2Wisconsin Alumni Research Foundation
- Optimized process for synthesizing methacrylic acid (maa) and/or alkyl methacrylate by reducing unwanted byproducts11 Jan 2024US 2024/0010604 A1Rohm Co., Ltd.
- Optimized process for synthesizing alkyl methacrylate by reducing unwanted byproducts28 Dec 2023US 2023/0416184 A1Rohm Co., Ltd.
- Improved process for preparing methyl methacrylate and/or methacrylic acid by reduced back mixing during conversion14 Dec 2023US 2023/0399286 A1Rohm Co., Ltd.
- Reagents and Methods for Esterification24 Feb 2022US 2022/0055979 A1Wisconsin Alumni Research Foundation
- Process for preparing azelaic acid18 Feb 2021US 2021/0047257 A1Corum Inc.
Most cited
By later US patents
- Apparatus and process for the high yield production of methyl methacrylate or methacrylic acid51US 6,545,176 B1Rohm and Haas Company · 2003
- Apparatus and process for the high yield production of methyl methacrylate or methacrylic acid48US 6,610,177 B2Rohm and Haas Company · 2003
- Method of making carboxylic acid esters20US 4,055,590 ARohm Co., Ltd. · 1977
- Process for producing carboxylic acid esters from nitriles18US 4,408,067 ANitto Chemical Industries Co., Ltd. · 1983
- Process for production of methacrylic acid16US 7,253,307 B1Rohm and Haas Company · 2007