C07C 68/08
Purification
Official title: Purification; Separation; Stabilisation
C07C68/08 (Purification) appears on 122 US grants and 121 published applications in this corpus.
Search patents in C07C- Granted patents
- 122
- Published applications
- 121
- Assignees
- 79
- Inventors
- 309
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 5 | 4 |
| 2003 | 7 | 7 |
| 2004 | 3 | 6 |
| 2005 | 3 | 4 |
| 2006 | 3 | 0 |
| 2007 | 1 | 10 |
| 2008 | 2 | 6 |
| 2009 | 2 | 9 |
| 2010 | 3 | 1 |
| 2011 | 5 | 7 |
| 2012 | 2 | 6 |
| 2013 | 4 | 1 |
| 2014 | 4 | 5 |
| 2015 | 4 | 3 |
| 2016 | 3 | 1 |
| 2017 | 4 | 7 |
| 2018 | 2 | 5 |
| 2019 | 7 | 2 |
| 2020 | 1 | 4 |
| 2021 | 3 | 2 |
| 2022 | 1 | 5 |
| 2023 | 1 | 7 |
| 2024 | 6 | 10 |
| 2025 | 1 | 6 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus and method of producing dimethyl carbonate by reactive distillation using hybrid heat integration16 Jun 2026US 12,655,087 B2
- Method for recovering raw and auxiliary materials in the production of lithium bis(fluorosulfonyl)imide9 Jun 2026US 12,649,659 B2Catl-Sicong Novel Materials Co., Ltd
- Method of preparing heterogeneous linear carbonate using catalyst having excellent solubility12 May 2026US 12,623,994 B2Lotte Chemical Corporation
- Method of preparing heterogeneous linear carbonate using amine-based compound catalyst12 May 2026US 12,623,995 B2Lotte Chemical Corporation
- Method of producing a low glycidol monoglyceride composition and the low glycidol monoglyceride composition as such3 Mar 2026US 12,565,470 B2Palsgaard A/S
- Method for producing carbonate having ethyl group and apparatus for producing carbonate having ethyl group1 Oct 2026US 2026/0297015 A1Asahi Kasei Kabushiki Kaisha
- Intermolecular cyclopropanation of unsaturated hydrocarbons20 Aug 2026US 2026/0242327 A1The Penn State Research Foundation
- Depolymerization method for resin having fluorene skeleton, and product and application thereof15 Jan 2026US 2026/0015483 A1Osaka Gas Chemicals Co., Ltd.
- Synthetic intermediates and improved processes for preparing ROCk inhibitors3 Apr 2025US 2025/0109106 A1Alcon Inc.
- Method for producing highly pure diaryl carbonate13 Feb 2025US 2025/0051259 A1Asahi Kasei Kabushiki Kaisha
Most cited
By later US patents
- Method of recovering and purifying diphenylcarbonate from phenolic solutions thereof60US 5,239,106 AGeneral Electric Company · 1993
- Removal of alkaline catalysts from polyether polyols and polyalkylene carbonate polyols38US 4,528,364 AThe Dow Chemical Company · 1985
- Solvent extraction apparatus28US 4,258,010 AEszakmagyarorszagi Vegyimu_ vek · 1981
- Salicylic acid ester derivative and its production27US 6,410,777 B1Teijin Limited · 2002
- Separation of organic liquids20US 4,798,674 ATexaco Inc. · 1989