C07C 67/52
By change in the physical state
Official title: by change in the physical state, e.g. crystallisation
C07C67/52 (By change in the physical state) appears on 617 US grants and 576 published applications in this corpus.
Search patents in C07C- Granted patents
- 617
- Published applications
- 576
- Assignees
- 340
- Inventors
- 1,768
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 14 | 0 |
| 1994 | 8 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 3 |
| 2002 | 12 | 11 |
| 2003 | 8 | 10 |
| 2004 | 10 | 24 |
| 2005 | 11 | 19 |
| 2006 | 11 | 12 |
| 2007 | 15 | 18 |
| 2008 | 15 | 15 |
| 2009 | 6 | 7 |
| 2010 | 9 | 15 |
| 2011 | 6 | 13 |
| 2012 | 7 | 16 |
| 2013 | 16 | 21 |
| 2014 | 14 | 21 |
| 2015 | 24 | 24 |
| 2016 | 24 | 43 |
| 2017 | 27 | 41 |
| 2018 | 29 | 32 |
| 2019 | 35 | 34 |
| 2020 | 37 | 24 |
| 2021 | 25 | 25 |
| 2022 | 17 | 27 |
| 2023 | 12 | 26 |
| 2024 | 21 | 28 |
| 2025 | 20 | 36 |
| 2026 | 13 | 31 |
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
- Continuous method for producing n-butyl(meth)acrylate including a catalyst recirculation process14 Jul 2026US 12,679,798 B2BASF SE
- Method for manufacturing a recycled material composition7 Jul 2026US 12,674,037 B2SK Chemicals Co., Ltd.
- 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
- Compositions of and methods of making ultra-pure tricaprilin3 Sep 2026US 2026/0257983 A1Cerecin Australia Pty Limited
- Process for the preparation of ethylhexylglycerol27 Aug 2026US 2026/0250225 A1Symrise AG
- Processes for making 1,2-diacetoxyethane from monoethylene glycol by reactive distillation and integrated vinyl acetate monomer production6 Aug 2026US 2026/0225987 A1New Product Innovation, LLC
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
- Process168US 7,553,397 B1Davy Process Technology Limited · 2009
- Continuous production of ethanol and plural stage distillation of the same157US 4,454,358 ABASF SE · 1984