B01J 31/0244
With nitrogen contained as ring member in aromatic compounds or moieties
Official title: {with nitrogen contained as ring member in aromatic compounds or moieties, e.g. pyridine}
B01J31/0244 (With nitrogen contained as ring member in aromatic compounds or moieties) appears on 292 US grants and 273 published applications in this corpus.
Search patents in B01J- Granted patents
- 292
- Published applications
- 273
- Assignees
- 234
- Inventors
- 960
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 8 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 19 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 5 |
| 2003 | 4 | 3 |
| 2004 | 2 | 9 |
| 2005 | 3 | 13 |
| 2006 | 5 | 5 |
| 2007 | 6 | 6 |
| 2008 | 5 | 8 |
| 2009 | 4 | 3 |
| 2010 | 6 | 11 |
| 2011 | 6 | 4 |
| 2012 | 3 | 5 |
| 2013 | 5 | 15 |
| 2014 | 10 | 5 |
| 2015 | 9 | 9 |
| 2016 | 11 | 13 |
| 2017 | 7 | 9 |
| 2018 | 10 | 18 |
| 2019 | 20 | 20 |
| 2020 | 13 | 13 |
| 2021 | 11 | 16 |
| 2022 | 11 | 17 |
| 2023 | 15 | 32 |
| 2024 | 5 | 14 |
| 2025 | 10 | 14 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Carbamate production method, carbamate ester production method, and urea derivative production method12 May 2026US 12,623,999 B2National Institute of Advanced Industrial Science and Technology
- Method for producing asymmetric linear carbonate7 Apr 2026US 12,595,225 B2LG Chem.Ltd.
- Non-metal catalyst for synthesizing polycarbonate by CO2 and preparation method therefor31 Mar 2026US 12,589,384 B2Wuhan Institute of Technology
- Oxygen reduction catalyst and use thereof8 Oct 2026US 2026/0307067 A1Toyota Jidosha Kabushiki Kaisha
- Intermolecular cyclopropanation of unsaturated hydrocarbons20 Aug 2026US 2026/0242327 A1The Penn State Research Foundation
- Carbon nanotube-porphyrin photocatalysts16 Jul 2026US 2026/0199888 A1
- Preparation Method and Application of Imidazole-Functionalized Metal-Organic Framework Material Im RE-MOF With Lipase-Mimetic Catalytic Activity30 Apr 2026US 2026/0116898 A1Jiangnan University
- Powder coating composition22 Jan 2026US 2026/0022268 A1Allnex USA Inc.
Most cited
By later US patents
- Phase transfer catalyzed preparation of aromatic polyether polymers113US 5,229,482 AGeneral Electric Company · 1993
- Homogeneous catalyst formulations for methanol production67US 4,992,480 AAssociated Universities, Inc. · 1991
- Substituted porphyrins, porphyrin-containing polymers, and synthetic methods therefor61US 5,371,199 AThe Trustees of the University of Pennsylvania · 1994
- Ring-metalated porphyrins56US 5,493,017 AThe Trustees of the University of Pennsylvania · 1996
- Process for the purification of terephthalic acid55US 4,605,763 AEastman Kodak Company · 1986