C07C 37/78
By azeotropic distillation
Official title: by azeotropic distillation
C07C37/78 (By azeotropic distillation) appears on 21 US grants and 10 published applications in this corpus.
Search patents in C07C- Granted patents
- 21
- Published applications
- 10
- Assignees
- 11
- Inventors
- 45
- Latest grant
- 4 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 3 |
| 2020 | 3 | 1 |
| 2021 | 2 | 2 |
| 2022 | 0 | 0 |
| 2023 | 2 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom4 Mar 2025US 12,240,807 B2Monsanto Technology LLC
- Manufacturing and purification technology for high purity Propofol26 Sep 2023US 11,767,281 B2
- Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom18 Apr 2023US 11,629,114 B2Monsanto Technology LLC
- Method for purifying phenol10 Aug 2021US 11,084,771 B2LG Chem.Ltd.
- Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom9 Feb 2021US 10,913,701 B2Monsanto Technology LLC
- Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom29 Jun 2023US 2023/0202961 A1Monsanto Technology LLC
- Manufacturing and purification technology for high purity propofol25 May 2023US 2023/0159420 A1
- Method for purifying phenol1 Jul 2021US 2021/0198170 A1LG Chem.Ltd.
- Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom3 Jun 2021US 2021/0163395 A1Monsanto Technology LLC
- Method for purifying phenol12 Mar 2020US 2020/0079716 A1LG Chem.Ltd.
Most cited
By later US patents
- Distillation process for recovery of high purity phenol78US 5,064,507 AAllied-Signal Inc. · 1991
- Method for making bisphenoxide salts and bisimides derived therefrom36US 4,257,953 AGeneral Electric Company · 1981
- Method for making alkali metal bisphenoxide salts and bisimides derived therefrom11US 4,302,616 AGeneral Electric Company · 1981
- Azeotropic recovery of BPA and phenol from aqueous effluent streams9US 4,469,561 AGeneral Electric Company · 1984
- Phenol purification7US 4,857,151 AThe Lummus Company · 1989