C07C 263/18
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C263/18 (Separation) appears on 251 US grants and 186 published applications in this corpus.
Search patents in C07C- Granted patents
- 251
- Published applications
- 186
- Assignees
- 82
- Inventors
- 682
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 9 | 0 |
| 1982 | 8 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 3 | 5 |
| 2005 | 1 | 6 |
| 2006 | 4 | 8 |
| 2007 | 1 | 7 |
| 2008 | 3 | 7 |
| 2009 | 7 | 4 |
| 2010 | 4 | 6 |
| 2011 | 1 | 8 |
| 2012 | 3 | 4 |
| 2013 | 2 | 5 |
| 2014 | 5 | 5 |
| 2015 | 9 | 7 |
| 2016 | 6 | 6 |
| 2017 | 10 | 9 |
| 2018 | 8 | 8 |
| 2019 | 7 | 5 |
| 2020 | 7 | 14 |
| 2021 | 11 | 23 |
| 2022 | 9 | 7 |
| 2023 | 8 | 6 |
| 2024 | 6 | 17 |
| 2025 | 6 | 7 |
| 2026 | 8 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for preparing isocyanate compound6 Oct 2026US 12,753,150 B2Hanwha Solutions Corporation
- Xylylene diisocynate composition, preparation method therefor and use thereof14 Jul 2026US 12,679,923 B2Wanhua Chemical Group Co., Ltd.
- Method of separating phosgene and hydrogen chloride23 Jun 2026US 12,662,376 B2BASF SE
- Xylylene diisocyanate composition and optical composition comprising same9 Jun 2026US 12,649,818 B2SK Pucore Co., Ltd.
- Distillation of polyisocyanates19 May 2026US 12,630,662 B2Covestro Deutschland AG
- Method for preparing isocyanate by combining supercritical phosgenation method with piping method1 Oct 2026US 2026/0297019 A1Mojia (Shanghai) Biotech Co., Ltd
- Method for preparing diisocyanate11 Jun 2026US 2026/0159475 A1Hanwha Solutions Corporation
- Carbonyl compound, method for producing carbonyl compound, method for producing isocyanate compound, and isocyanate composition4 Jun 2026US 2026/0152469 A1Asahi Kasei Kabushiki Kaisha
- Compounds and compositions for intracellular delivery of therapeutic agents19 Mar 2026US 2026/0078082 A1ModernaTX, Inc.
- Method for treating residue from the production of organic isocyanates5 Mar 2026US 2026/0062379 A1Covestro Deutschland AG
Most cited
By later US patents
- Compounds and compositions for intracellular delivery of therapeutic agents143US 9,868,691 B2ModernaTX, Inc. · 2018
- Low-temperature storage stable liquid diphenylmethane diisocyanates65US 4,118,411 AMobay Chemical Corporation · 1978
- Compounds and compositions for intracellular delivery of therapeutic agents62US 9,868,692 B2ModernaTX, Inc. · 2018
- Low-temperature storage stable liquid diphenylmethane diisocyanates61US 4,115,429 AMobay Chemical Corporation · 1978
- Process for the preparation of (cyclo)aliphatic diisocyanates60US 4,847,408 ABayer Aktiengesellschaft · 1989