B01J 31/1805
The ligands containing nitrogen
Official title: {the ligands containing nitrogen}
B01J31/1805 (The ligands containing nitrogen) appears on 1,879 US grants and 1,562 published applications in this corpus.
Search patents in B01J- Granted patents
- 1,879
- Published applications
- 1,562
- Assignees
- 855
- Inventors
- 4,439
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 35 | 0 |
| 1977 | 16 | 0 |
| 1978 | 35 | 0 |
| 1979 | 23 | 0 |
| 1980 | 23 | 0 |
| 1981 | 37 | 0 |
| 1982 | 32 | 0 |
| 1983 | 24 | 0 |
| 1984 | 17 | 0 |
| 1985 | 15 | 0 |
| 1986 | 13 | 0 |
| 1987 | 15 | 0 |
| 1988 | 13 | 0 |
| 1989 | 31 | 0 |
| 1990 | 26 | 0 |
| 1991 | 19 | 0 |
| 1992 | 34 | 0 |
| 1993 | 23 | 0 |
| 1994 | 30 | 0 |
| 1995 | 32 | 0 |
| 1996 | 34 | 0 |
| 1997 | 22 | 0 |
| 1998 | 56 | 0 |
| 1999 | 35 | 0 |
| 2000 | 44 | 0 |
| 2001 | 42 | 16 |
| 2002 | 40 | 45 |
| 2003 | 46 | 58 |
| 2004 | 36 | 59 |
| 2005 | 37 | 73 |
| 2006 | 46 | 53 |
| 2007 | 37 | 44 |
| 2008 | 30 | 53 |
| 2009 | 33 | 49 |
| 2010 | 33 | 68 |
| 2011 | 38 | 76 |
| 2012 | 50 | 58 |
| 2013 | 49 | 56 |
| 2014 | 42 | 62 |
| 2015 | 52 | 67 |
| 2016 | 71 | 71 |
| 2017 | 54 | 65 |
| 2018 | 63 | 63 |
| 2019 | 59 | 84 |
| 2020 | 51 | 71 |
| 2021 | 74 | 74 |
| 2022 | 41 | 72 |
| 2023 | 52 | 78 |
| 2024 | 50 | 66 |
| 2025 | 39 | 54 |
| 2026 | 30 | 27 |
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
- Method for carrying out reaction of isatin compound and cyclopropenone compound at low catalytic amount22 Sep 2026US 12,741,972 B2Soochow University
- Methods for preparing (2S,3R,4R)-4,5-dihydroxyisoleucine derivative and intermediates thereof15 Sep 2026US 12,735,384 B2Inner Mongolia Duhe Innovation R & D Tech Co., Ltd
- 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
- Selective olefin oligomerization with transition metal amine bis(phenolate) catalysts8 Oct 2026US 2026/0308083 A1Chevron Phillips Chemical Company LP
- Process for preparing 2,3-unsaturated alcohols8 Oct 2026US 2026/0308092 A1BASF SE
- Processes for preparing c-4 sugars and ketose sugars24 Sep 2026US 2026/0285894 A1
- Bulky and small-steric-hindrance ligand and use thereof17 Sep 2026US 2026/0273518 A1Dg Hc Optical Co., Ltd
- Intermolecular cyclopropanation of unsaturated hydrocarbons20 Aug 2026US 2026/0242327 A1The Penn State Research Foundation
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
- Silica-coated alumina activator-supports for metallocene catalyst compositions292US 7,884,163 B2Chevron Phillips Chemical Company LP · 2011