C07C 67/48
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C67/48 (Separation) appears on 1,290 US grants and 1,158 published applications in this corpus.
Search patents in C07C- Granted patents
- 1,290
- Published applications
- 1,158
- Assignees
- 651
- Inventors
- 3,407
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 20 | 0 |
| 1978 | 17 | 0 |
| 1979 | 9 | 0 |
| 1980 | 16 | 0 |
| 1981 | 13 | 0 |
| 1982 | 14 | 0 |
| 1983 | 14 | 0 |
| 1984 | 9 | 0 |
| 1985 | 18 | 0 |
| 1986 | 9 | 0 |
| 1987 | 19 | 0 |
| 1988 | 22 | 0 |
| 1989 | 16 | 0 |
| 1990 | 15 | 0 |
| 1991 | 9 | 0 |
| 1992 | 23 | 0 |
| 1993 | 23 | 0 |
| 1994 | 20 | 0 |
| 1995 | 17 | 0 |
| 1996 | 14 | 0 |
| 1997 | 14 | 0 |
| 1998 | 25 | 0 |
| 1999 | 23 | 0 |
| 2000 | 23 | 0 |
| 2001 | 31 | 8 |
| 2002 | 30 | 21 |
| 2003 | 26 | 24 |
| 2004 | 19 | 49 |
| 2005 | 23 | 39 |
| 2006 | 30 | 30 |
| 2007 | 24 | 36 |
| 2008 | 23 | 28 |
| 2009 | 15 | 26 |
| 2010 | 23 | 35 |
| 2011 | 16 | 37 |
| 2012 | 21 | 30 |
| 2013 | 29 | 45 |
| 2014 | 38 | 49 |
| 2015 | 46 | 53 |
| 2016 | 50 | 83 |
| 2017 | 52 | 72 |
| 2018 | 49 | 56 |
| 2019 | 55 | 62 |
| 2020 | 65 | 61 |
| 2021 | 57 | 40 |
| 2022 | 35 | 51 |
| 2023 | 21 | 53 |
| 2024 | 32 | 61 |
| 2025 | 38 | 65 |
| 2026 | 29 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heterogeneous catalyst for transesterification and method of preparing same6 Oct 2026US RE51,051 E1Crystaphase Products, Inc.
- Method for producing fluorine-containing polymer and composition22 Sep 2026US 12,742,031 B2Central Glass Company, Limited
- Process for producing bis(2-hydroxyethyl) terephthalate in liquid form by depolymerization of polyethylene terephthalate (PET)15 Sep 2026US 12,735,551 B2Chempet S.r.I
- Composition and method for preparing the same14 Jul 2026US 12,679,797 B2Industrial Technology Research Institute
- Continuous method for producing n-butyl(meth)acrylate including a catalyst recirculation process14 Jul 2026US 12,679,798 B2BASF SE
- Method for purifying light acrylates8 Oct 2026US 2026/0308101 A1Arkema France
- Method and plant for purifying a fatty acid isopropyl ester and for producing pure fatty acid isopropyl ester1 Oct 2026US 2026/0297013 A1Sulzer Management AG
- Reactive Separation Systems for Recovery or Valorization of Carboxylic Acids from Dilute Streams1 Oct 2026US 2026/0297014 A1Dioxycle
- Compositions of and methods of making ultra-pure tricaprilin3 Sep 2026US 2026/0257983 A1Cerecin Australia Pty Limited
- Purification process of ethyl formate27 Aug 2026US 2026/0249251 A1Taicang Hushi Reagent Co., Ltd.
Most cited
By later US patents
- Spinal treatment and long bone fixation apparatus and method255US 5,716,357 A1998
- Method to produce highly pure eicosapentaenoic acid or its ester176US 5,840,944 ANippon Suisan Kaisha, Ltd. · 1998
- Method of purifying eicosapentaenoic acid and its esters173US 4,377,526 ANippon Suisan Kaisha, Ltd. · 1983
- Method of stabilizing an .omega.-3 unsaturated fatty acid compound168US 5,567,730 AMaruha Corporation · 1996
- Process168US 7,553,397 B1Davy Process Technology Limited · 2009