B01J 31/1825
Ligands comprising condensed ring systems
Official title: {Ligands comprising condensed ring systems, e.g. acridine, carbazole}
B01J31/1825 (Ligands comprising condensed ring systems) appears on 447 US grants and 371 published applications in this corpus.
Search patents in B01J- Granted patents
- 447
- Published applications
- 371
- Assignees
- 268
- Inventors
- 1,100
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 15 | 0 |
| 1979 | 7 | 0 |
| 1980 | 3 | 0 |
| 1981 | 14 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 14 | 0 |
| 1990 | 13 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 10 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 0 |
| 2002 | 4 | 6 |
| 2003 | 7 | 16 |
| 2004 | 9 | 10 |
| 2005 | 9 | 15 |
| 2006 | 10 | 7 |
| 2007 | 7 | 3 |
| 2008 | 1 | 10 |
| 2009 | 5 | 9 |
| 2010 | 4 | 14 |
| 2011 | 8 | 21 |
| 2012 | 12 | 8 |
| 2013 | 7 | 20 |
| 2014 | 12 | 10 |
| 2015 | 15 | 18 |
| 2016 | 17 | 16 |
| 2017 | 11 | 18 |
| 2018 | 14 | 12 |
| 2019 | 18 | 25 |
| 2020 | 15 | 26 |
| 2021 | 21 | 23 |
| 2022 | 15 | 24 |
| 2023 | 20 | 20 |
| 2024 | 17 | 17 |
| 2025 | 15 | 14 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Complex catalyst containing imine-based ligand for polymerizing cyclic olefin-based monomer and method for preparing cyclic olefin-based polymer using same1 Sep 2026US 12,723,114 B2Kyungpook National University Industry-Academic Cooperation Foundation
- Oxidized polyethylene compounds and methods of making the same18 Aug 2026US 12,709,680 B2The Regents of the University of California
- Synthesis of atomically dispersed M—N—C catalysts via selective metalation11 Aug 2026US 12,702,970 B2Wisconsin Alumni Research Foundation
- Selective photocatalytic reduction of alkynes to alkenes powered by a cobalt-porphyrin metal-organic frameworks16 Jun 2026US 12,655,078 B2Northwestern University
- Porphyrin-based metal coordination conjugated polymer, preparation method therefor, and application thereof in photocatalytic degradation of organic pollutants26 May 2026US 12,636,642 B2Soochow University
- Selective olefin oligomerization with transition metal amine bis(phenolate) catalysts8 Oct 2026US 2026/0308083 A1Chevron Phillips Chemical Company LP
- Regio-controllable [2+2] benzannulation with two adjacent c(sp3)-h bonds20 Aug 2026US 2026/0242341 A1The Scripps Research Institute
- Catalyst for sp3-carbon-hydrogen-bond primary amination reaction, and method for preparing primary amine compound13 Aug 2026US 2026/0234096 A1West China Second University Hospital, Sichuan University
- Ammonia synthesis catalyst, ammonia production device, and ammonia production method6 Aug 2026US 2026/0225088 A1Idemitsu Kosan Co., Ltd.
- Carbon nanotube-porphyrin photocatalysts16 Jul 2026US 2026/0199888 A1
Most cited
By later US patents
- Functional, photochemically active, and chemically asymmetric membranes by interfacial polymerization of derivatized multifunctional prepolymers410US 4,784,736 ABend Research, Inc. · 1988
- Functional, photochemically active, and chemically asymmetric membranes by interfacial polymerization of derivatized multifunctional prepolymers370US 4,917,800 ABend Research, Inc. · 1990
- Polymerization of .alpha.-olefins with transition metal catalysts based on bidentate ligands containing pyridine or quinoline moiety209US 5,637,660 ALyondell Petrochemical Company · 1997
- Hydroconversion process82US 4,067,799 AExxon Research & Engineering Co. · 1978
- Substituted aminomethylphosphines, compositions and coordination complexes of same, their synthesis and processes using same82US 6,043,363 ASymyx Technologies, Inc. · 2000