B01J 31/1815
With more than one complexing nitrogen atom
Official title: {with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine}
B01J31/1815 (With more than one complexing nitrogen atom) appears on 652 US grants and 665 published applications in this corpus.
Search patents in B01J- Granted patents
- 652
- Published applications
- 665
- Assignees
- 433
- Inventors
- 1,902
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 10 | 0 |
| 1990 | 9 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 16 | 0 |
| 1997 | 14 | 0 |
| 1998 | 21 | 0 |
| 1999 | 13 | 0 |
| 2000 | 17 | 0 |
| 2001 | 13 | 6 |
| 2002 | 17 | 18 |
| 2003 | 14 | 20 |
| 2004 | 12 | 24 |
| 2005 | 12 | 30 |
| 2006 | 16 | 17 |
| 2007 | 13 | 20 |
| 2008 | 14 | 21 |
| 2009 | 16 | 24 |
| 2010 | 10 | 22 |
| 2011 | 14 | 28 |
| 2012 | 15 | 28 |
| 2013 | 22 | 23 |
| 2014 | 17 | 30 |
| 2015 | 22 | 21 |
| 2016 | 27 | 30 |
| 2017 | 20 | 23 |
| 2018 | 30 | 36 |
| 2019 | 18 | 34 |
| 2020 | 23 | 34 |
| 2021 | 38 | 29 |
| 2022 | 20 | 37 |
| 2023 | 24 | 39 |
| 2024 | 24 | 38 |
| 2025 | 16 | 23 |
| 2026 | 18 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Immobolized organometallic catalyst and application of same6 Oct 2026US 12,752,265 B2Saudi Arabian Oil Company
- Cobalt catalysts containing “smart” or “task specific” anions1 Sep 2026US 12,722,146 B2The Texas A&M University System
- 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
- Processes for preparing c-4 sugars and ketose sugars24 Sep 2026US 2026/0285894 A1
- Intermolecular cyclopropanation of unsaturated hydrocarbons20 Aug 2026US 2026/0242327 A1The Penn State Research Foundation
- 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.
- Proximity-based labeling of biomolecular condensate microenvironments9 Jul 2026US 2026/0194528 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
- Method of expanded porphyrin-oligonucleotide conjugate synthesis325US 5,565,552 ABoard of Regents, Univ. of Texas Sys. · 1996
- Texaphyrin-oligonucleotide conjugates308US 5,587,371 ABoard of Trustees, Univ. of TX Sys. · 1996
- Chromophore probe for detection of nucleic acid221US 5,595,726 ABoard of Trustees, Univ. of TX Sys. · 1997