C07C 67/28
Preparation of carboxylic acid esters: by modifying the hydroxylic moiety of the
Official title: by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
C07C67/28 (Preparation of carboxylic acid esters: by modifying the hydroxylic moiety of the) appears on 566 US grants and 516 published applications in this corpus.
Search patents in C07C- Granted patents
- 566
- Published applications
- 516
- Assignees
- 379
- Inventors
- 1,626
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 12 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 11 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 13 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 13 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 17 | 2 |
| 2002 | 13 | 19 |
| 2003 | 12 | 16 |
| 2004 | 8 | 20 |
| 2005 | 14 | 18 |
| 2006 | 12 | 19 |
| 2007 | 16 | 15 |
| 2008 | 5 | 8 |
| 2009 | 11 | 17 |
| 2010 | 7 | 21 |
| 2011 | 10 | 19 |
| 2012 | 16 | 18 |
| 2013 | 12 | 28 |
| 2014 | 20 | 26 |
| 2015 | 33 | 35 |
| 2016 | 31 | 35 |
| 2017 | 24 | 23 |
| 2018 | 25 | 25 |
| 2019 | 17 | 19 |
| 2020 | 24 | 19 |
| 2021 | 14 | 16 |
| 2022 | 7 | 22 |
| 2023 | 9 | 17 |
| 2024 | 10 | 24 |
| 2025 | 14 | 22 |
| 2026 | 6 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
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Most cited
By later US patents
- Preparation of ethyl acetate123US 4,465,854 AEastman Kodak Company · 1984
- Preparation of ethyl acetate123US 4,886,905 AEastman Kodak Company · 1989
- Preparation of ethyl acetate121US 4,471,136 AEastman Kodak Company · 1984
- Recyclable metathesis catalysts82US 6,921,735 B2The Trustees of Boston College · 2005
- Method and apparatus for secure transmission of video signals73US 5,555,305 ABritish Broadcasting Corporation · 1996