C07C 51/46
By azeotropic distillation
Official title: by azeotropic distillation
C07C51/46 (By azeotropic distillation) appears on 101 US grants and 101 published applications in this corpus.
Search patents in C07C- Granted patents
- 101
- Published applications
- 101
- Assignees
- 64
- Inventors
- 284
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 2 |
| 2003 | 1 | 11 |
| 2004 | 4 | 3 |
| 2005 | 4 | 3 |
| 2006 | 4 | 3 |
| 2007 | 1 | 4 |
| 2008 | 3 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 2 |
| 2011 | 3 | 6 |
| 2012 | 2 | 1 |
| 2013 | 2 | 8 |
| 2014 | 5 | 6 |
| 2015 | 8 | 6 |
| 2016 | 2 | 4 |
| 2017 | 1 | 3 |
| 2018 | 5 | 2 |
| 2019 | 9 | 8 |
| 2020 | 3 | 4 |
| 2021 | 4 | 2 |
| 2022 | 1 | 3 |
| 2023 | 2 | 5 |
| 2024 | 3 | 3 |
| 2025 | 0 | 6 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Process for azeotropic distillation63US 4,204,915 AMitsui Petrochemical Industries, Ltd. · 1980
- Process for producing aliphatic carboxylic acid49US 7,319,168 B2Nippon Shokubai Co., Ltd. · 2008
- Carbonylation of methanol to acetic acid with removal of impurities from the product43US 6,326,515 B1BP Chemicals Limited · 2001
- Process for separating mixtures of substances of low volatility33US 4,345,976 A1982
- Process for preparing (meth) acrylic acid27US 6,500,982 B1Rohm and Haas Company · 2002