C07C 67/00
Preparation of carboxylic acid esters
C07C67/00 (Preparation of carboxylic acid esters) appears on 8,177 US grants and 6,812 published applications in this corpus.
Search patents in C07C- Granted patents
- 8,177
- Published applications
- 6,812
- Assignees
- 2,693
- Inventors
- 17,365
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 107 | 0 |
| 1977 | 110 | 0 |
| 1978 | 96 | 0 |
| 1979 | 63 | 0 |
| 1980 | 92 | 0 |
| 1981 | 94 | 0 |
| 1982 | 93 | 0 |
| 1983 | 71 | 0 |
| 1984 | 118 | 0 |
| 1985 | 106 | 0 |
| 1986 | 83 | 0 |
| 1987 | 89 | 0 |
| 1988 | 86 | 0 |
| 1989 | 85 | 0 |
| 1990 | 84 | 0 |
| 1991 | 96 | 0 |
| 1992 | 130 | 0 |
| 1993 | 168 | 0 |
| 1994 | 145 | 0 |
| 1995 | 128 | 0 |
| 1996 | 123 | 0 |
| 1997 | 121 | 0 |
| 1998 | 182 | 0 |
| 1999 | 164 | 0 |
| 2000 | 184 | 0 |
| 2001 | 221 | 54 |
| 2002 | 226 | 187 |
| 2003 | 192 | 214 |
| 2004 | 147 | 261 |
| 2005 | 150 | 250 |
| 2006 | 163 | 238 |
| 2007 | 161 | 212 |
| 2008 | 141 | 221 |
| 2009 | 127 | 254 |
| 2010 | 173 | 335 |
| 2011 | 163 | 305 |
| 2012 | 219 | 286 |
| 2013 | 274 | 348 |
| 2014 | 300 | 318 |
| 2015 | 326 | 376 |
| 2016 | 344 | 406 |
| 2017 | 311 | 318 |
| 2018 | 287 | 299 |
| 2019 | 253 | 274 |
| 2020 | 286 | 275 |
| 2021 | 197 | 231 |
| 2022 | 159 | 272 |
| 2023 | 149 | 254 |
| 2024 | 143 | 265 |
| 2025 | 149 | 215 |
| 2026 | 98 | 144 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 67/30Preparation of carboxylic acid esters: by modifying the acid moiety of the2,475
- C07C 67/08Preparation of carboxylic acid esters: by reacting carboxylic acids or symmetrical anhydrides1,637
- C07C 67/48Separation1,290
- C07C 67/03Preparation of carboxylic acid esters: by reacting an ester group with a898
- C07C 67/04Preparation of carboxylic acid esters: by reacting carboxylic acids or symmetrical anhydrides638
- C07C 67/36Preparation of carboxylic acid esters: by reaction with carbon monoxide or formates638
- C07C 67/28Preparation of carboxylic acid esters: by modifying the hydroxylic moiety of the566
- C07C 67/14From carboxylic acid halides354
All 22 subgroupsShow fewer
- C07C 67/39Preparation of carboxylic acid esters: by oxidation of groups which are precursors348
- C07C 67/10Preparation of carboxylic acid esters: by reacting carboxylic acids or symmetrical anhydrides255
- C07C 67/24Preparation of carboxylic acid esters: by reacting carboxylic acids or derivatives thereof222
- C07C 67/02Preparation of carboxylic acid esters: by interreacting ester groups, i.e. transesterification168
- C07C 67/475Preparation of carboxylic acid esters: by splitting of carbon-to-carbon bonds and redistribution135
- C07C 67/18Preparation of carboxylic acid esters: by conversion of a group containing nitrogen96
- C07C 67/035Preparation of carboxylic acid esters: by reacting carboxylic acids or symmetrical anhydrides65
- C07C 67/44Preparation of carboxylic acid esters: by oxidation-reduction of aldehydes56
- C07C 67/46From ketenes or polyketenes46
- C07C 67/12From asymmetrical anhydrides31
- C07C 67/465Preparation of carboxylic acid esters: by oligomerisation30
- C07C 67/27From ortho-esters29
- C07C 67/47Preparation of carboxylic acid esters: by telomerisation17
- C07C 67/16From carboxylic acids, esters or anhydrides wherein one oxygen atom has been2
Recent patents
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- Heterogeneous catalyst for transesterification and method of preparing same6 Oct 2026US RE51,051 E1Crystaphase Products, Inc.
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- Compound, composition, method for expressing sensitizing effect and production method8 Oct 2026US 2026/0308100 A1Mitsubishi Gas Chemical Company, Inc.
- Method for purifying light acrylates8 Oct 2026US 2026/0308101 A1Arkema France
- Method and plant for purifying a fatty acid isopropyl ester and for producing pure fatty acid isopropyl ester1 Oct 2026US 2026/0297013 A1Sulzer Management AG
Most cited
By later US patents
- Titania-alumina supported palladium catalyst316US 8,507,720 B2Lyondell Chemical Technology, L,P. · 2013
- Process for producing ethanol284US 6,509,180 B1ZeaChem, Inc. · 2003
- Spinal treatment and long bone fixation apparatus and method255US 5,716,357 A1998
- Process for producing ethanol226US 6,927,048 B2Zea Chem, Inc. · 2005
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001