C07C 67/03
Preparation of carboxylic acid esters: by reacting an ester group with a
Official title: by reacting an ester group with a hydroxy group
C07C67/03 (Preparation of carboxylic acid esters: by reacting an ester group with a) appears on 898 US grants and 911 published applications in this corpus.
Search patents in C07C- Granted patents
- 898
- Published applications
- 911
- Assignees
- 552
- Inventors
- 2,395
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 10 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 10 | 0 |
| 1992 | 16 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 14 | 0 |
| 1996 | 18 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 16 | 0 |
| 2000 | 21 | 0 |
| 2001 | 17 | 2 |
| 2002 | 16 | 12 |
| 2003 | 18 | 21 |
| 2004 | 12 | 18 |
| 2005 | 19 | 35 |
| 2006 | 16 | 34 |
| 2007 | 16 | 32 |
| 2008 | 16 | 30 |
| 2009 | 17 | 38 |
| 2010 | 26 | 56 |
| 2011 | 27 | 44 |
| 2012 | 31 | 40 |
| 2013 | 34 | 30 |
| 2014 | 34 | 30 |
| 2015 | 35 | 47 |
| 2016 | 38 | 49 |
| 2017 | 37 | 35 |
| 2018 | 33 | 46 |
| 2019 | 38 | 44 |
| 2020 | 47 | 43 |
| 2021 | 24 | 38 |
| 2022 | 29 | 30 |
| 2023 | 27 | 35 |
| 2024 | 21 | 41 |
| 2025 | 26 | 50 |
| 2026 | 22 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heterogeneous catalyst for transesterification and method of preparing same6 Oct 2026US RE51,051 E1Crystaphase Products, Inc.
- Biorenewable synthesis of hydroxy-hexanoate esters25 Aug 2026US 12,715,835 B2Wisconsin Alumni Research Foundation
- Heterogeneous catalyst for transesterification and method of preparing same18 Aug 2026US RE50,994 E1Crystaphase Products, Inc.
- Composition and method for preparing the same14 Jul 2026US 12,679,797 B2Industrial Technology Research Institute
- Method for manufacturing a recycled material composition7 Jul 2026US 12,674,037 B2SK Chemicals Co., Ltd.
- Belly Blade Mounted to Center of Mower Equipment17 Sep 2026US 2026/0275210 A1
- Process for the preparation of hydroxyphenylcarboxylic acid esters using catalytic transesterification13 Aug 2026US 2026/0234094 A1BASF SE
- Enzyme variants and uses thereof13 Aug 2026US 2026/0234677 A1Samsara Eco Pty Limited
- Catalysts for solvolysis of polyester6 Aug 2026US 2026/0225087 A1Agency for Science, Technology and Research
- Method for preparing alkyl hydroxypropanoate6 Aug 2026US 2026/0225988 A1ZF Solution Co. Ltd.
Most cited
By later US patents
- Spinal treatment and long bone fixation apparatus and method255US 5,716,357 A1998
- Integrated process for producing carbonylation acetic acid, acetic anhydride, or coproduction of each from a methyl acetate by-product stream131US 7,115,772 B2Celanese International Corporation · 2006
- Process for the production of esters from vegetable oils or animal oils alcohols120US 5,908,946 AInstitut Francais du Petrole · 1999
- Process for production of esters for use as a diesel fuel substitute using a non-alkaline catalyst119US 5,525,126 AAgricultural Utilization Research Institute · 1996
- Process for the continuous production of lower alkyl esters of higher fatty acids95US 5,354,878 A1994