C07C 41/58
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C41/58 (Separation) appears on 65 US grants and 54 published applications in this corpus.
Search patents in C07C- Granted patents
- 65
- Published applications
- 54
- Assignees
- 54
- Inventors
- 212
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 3 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 4 |
| 2009 | 3 | 1 |
| 2010 | 3 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 3 |
| 2013 | 1 | 1 |
| 2014 | 0 | 7 |
| 2015 | 7 | 3 |
| 2016 | 5 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 2 | 4 |
| 2020 | 0 | 2 |
| 2021 | 4 | 1 |
| 2022 | 1 | 3 |
| 2023 | 1 | 5 |
| 2024 | 2 | 3 |
| 2025 | 4 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sustainable process for the manufacture of 1,1,4,4-tetramethoxy-2-butene6 Jan 2026US 12,516,009 B2Dsm IP Assets B.V.
- Process for obtaining isobutene from a C4-hydrocarbon mixture21 Oct 2025US 12,448,342 B2BASF SE
- Method for purifying (hydro)halocarbon by reduced pressure distillation from azeotropic or azeotropic-like composition21 Oct 2025US 12,448,343 B2Central Glass Company, Limited
- Process for obtaining isobutene from a C4-hydrocarbon mixture5 Aug 2025US 12,378,169 B2BASF SE
- Method for producing polyoxymethylene dimethyl ethers27 May 2025US 12,312,303 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- A process for preparing 2,2-dimethoxypropane17 Sep 2026US 2026/0274778 A1Aditya Birla Chemicals (Thailand) Ltd.
- Process for at least partially removing aldehydes from a composition containing at least one compound having at least one alkylene oxide unit10 Sep 2026US 2026/0263965 A1Zschimmer & Schwarz Chemie GmbH
- Process for obtaining isobutene from a c4-hydrocarbon mixture9 May 2024US 2024/0150264 A1BASF SE
- Process for obtaining isobutene from a c4-hydrocarbon mixture2 May 2024US 2024/0140885 A1BASF SE
- Method for producing organic fluorine compounds18 Jan 2024US 2024/0018081 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Process for producing acetaldehyde dimethylacetal33US 5,362,918 AShowa Denko K. K. · 1994
- Process of manufacturing equipment for preparing acetals and ketals29US 6,528,025 B1Roche Vitamins Inc. · 2003
- Process and manufacturing equipment for preparing acetals and ketals28US 6,806,392 B2Dsm IP Assets B.V. · 2004
- Stabilized acetal-acid compositions17US 4,448,977 AUnion Carbide Corporation · 1984
- Hydroformylation of olefins14US 4,658,068 AExxon Research & Engineering Co. · 1987