C07C 253/32
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C253/32 (Separation) appears on 316 US grants and 255 published applications in this corpus.
Search patents in C07C- Granted patents
- 316
- Published applications
- 255
- Assignees
- 191
- Inventors
- 813
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 17 | 0 |
| 2000 | 11 | 0 |
| 2001 | 8 | 4 |
| 2002 | 10 | 7 |
| 2003 | 10 | 6 |
| 2004 | 5 | 16 |
| 2005 | 6 | 7 |
| 2006 | 8 | 13 |
| 2007 | 5 | 11 |
| 2008 | 6 | 11 |
| 2009 | 11 | 12 |
| 2010 | 4 | 4 |
| 2011 | 10 | 8 |
| 2012 | 5 | 6 |
| 2013 | 6 | 5 |
| 2014 | 5 | 8 |
| 2015 | 5 | 8 |
| 2016 | 5 | 8 |
| 2017 | 8 | 14 |
| 2018 | 14 | 11 |
| 2019 | 10 | 12 |
| 2020 | 16 | 12 |
| 2021 | 4 | 10 |
| 2022 | 4 | 17 |
| 2023 | 8 | 18 |
| 2024 | 7 | 11 |
| 2025 | 16 | 9 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for producing hexamethylenediamine from caprolactam6 Oct 2026US 12,753,144 B2Ascend Performance Materials Operations LLC
- Cosmetic or dermatological composition comprising a merocyanine and a gamma-butyrolactone and/or a gamma-butyrolactam8 Sep 2026US 12,728,084 B2L'oreal
- Manufacture of nitrile compounds16 Jun 2026US 12,655,093 B2Nouryon Chemicals International B. V.
- Cis-para-substituted cyclohexylaminonitrile salt, preparation method therefor and use thereof, and method for preparing pesticide using same28 Apr 2026US 12,612,359 B2Hebei Guzhirun Technology Co., Ltd
- Method for concentrating raw material solution, and system for concentrating raw material solution17 Mar 2026US 12,576,362 B2Asahi Kasei Kabushiki Kaisha
- Process for producing isophorone nitrile24 Sep 2026US 2026/0285805 A1Evonik Operations GmbH
- Method for Concentrating Raw Material Solution, and System for Concentrating Raw Material Solution23 Jul 2026US 2026/0208109 A1Asahi Kasei Kabushiki Kaisha
- Acetonitrile compositions and methods of making the same16 Jul 2026US 2026/0200835 A1Nitto Denko Corporation
- Method for Concentrating Raw Material Solution, and System for Concentrating Raw Material Solution9 Jul 2026US 2026/0192254 A1Asahi Kasei Kabushiki Kaisha
- Acetonitrile compositions and methods of making the same23 Apr 2026US 2026/0109666 A1Safion Renewables Inc.
Most cited
By later US patents
- Analyte-controlled liquid delivery device and analyte monitor2,000US 5,800,420 AElan Medical Technologies Limited · 1998
- Analyte-controlled liquid delivery device and analyte monitor1,860US 5,807,375 AElan Medical Technologies Limited · 1998
- Analyte-controlled liquid delivery device and analyte monitor1,002US 5,820,622 AElan Medical Technologies Limited · 1998
- System and method for transporting inventory items150US 7,912,574 B2Kiva Systems, Inc. · 2011
- System and method for transporting inventory items129US 8,606,392 B2Amazon Technologies, Inc. · 2013