B01J 2531/0252
Salen ligands or analogues
Official title: Salen ligands or analogues, e.g. derived from ethylenediamine and salicylaldehyde
B01J2531/0252 (Salen ligands or analogues) appears on 134 US grants and 149 published applications in this corpus.
Search patents in B01J- Granted patents
- 134
- Published applications
- 149
- Assignees
- 100
- Inventors
- 377
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 2 |
| 2003 | 3 | 9 |
| 2004 | 4 | 5 |
| 2005 | 5 | 7 |
| 2006 | 6 | 5 |
| 2007 | 3 | 2 |
| 2008 | 3 | 6 |
| 2009 | 2 | 6 |
| 2010 | 6 | 10 |
| 2011 | 2 | 7 |
| 2012 | 6 | 4 |
| 2013 | 4 | 6 |
| 2014 | 3 | 11 |
| 2015 | 10 | 5 |
| 2016 | 11 | 5 |
| 2017 | 5 | 9 |
| 2018 | 3 | 3 |
| 2019 | 5 | 9 |
| 2020 | 8 | 8 |
| 2021 | 4 | 9 |
| 2022 | 3 | 9 |
| 2023 | 5 | 1 |
| 2024 | 3 | 5 |
| 2025 | 5 | 5 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Catalysts for synthesizing cyclic carbonates, preparation methods and uses thereof23 Dec 2025US 12,502,661 B2Anhui Conch Material Technology Co., Ltd.
- Catalyst composition for cyclic carbonate production from CO2 and epoxides16 Dec 2025US 12,496,575 B2PTT Global Chemical Public Company Limited
- Carbonylation catalysts and methods of making the same4 Nov 2025US 12,459,960 B2Novomer, Inc.
- Synthesis of metal complexes and uses thereof5 Aug 2025US 12,377,405 B2Novomer, Inc.
- Nanocage-confined catalyst, preparation process and use thereof4 Feb 2025US 12,214,339 B2China Petroleum & Chemical Corporation
- Novel Carbonylation Catalysts And Methods Of Making The Same7 May 2026US 2026/0125402 A1Novomer, Inc.
- Phenoxy-amidine ligands and complexes4 Dec 2025US 2025/0368663 A1Centre National De La Recherche Scientifique
- Catalysts for synthesizing cyclic carbonates, preparation methods and uses thereof20 Nov 2025US 2025/0352989 A1Anhui Conch Material Technology Co., Ltd.
- Binuclear schiff base-cobalt complex, preparation method and use thereof27 Mar 2025US 2025/0101054 A1Changchun Institute of Applied Chemistry Chinese Academy of Sciences
- Sterically modified schiff base ligands for enhanced catalytic carbonylation activity9 Jan 2025US 2025/0010278 A1Novomer, Inc.
Most cited
By later US patents
- Aminoalcohol lipidoids and uses thereof207US 8,450,298 B2Massachusetts Institute of Technology · 2013
- Aminoalcohol lipidoids and uses thereof109US 8,969,353 B2Massachusetts Institute of Technology · 2015
- Polycarbonates made using highly selective catalysts83US 7,304,172 B2Cornell Research Foundation, Inc. · 2007
- Chiral catalysts and catalytic epoxidation catalyzed thereby74US 5,637,739 AResearch Corporation Technologies, Inc. · 1997
- Catalytic carbonylation of three and four membered heterocycles68US 6,852,865 B2Cornell Research Foundation, Inc. · 2005