B01J 31/0278
Containing nitrogen as cationic centre
Official title: {containing nitrogen as cationic centre}
B01J31/0278 (Containing nitrogen as cationic centre) appears on 259 US grants and 347 published applications in this corpus.
Search patents in B01J- Granted patents
- 259
- Published applications
- 347
- Assignees
- 171
- Inventors
- 757
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 6 |
| 2003 | 5 | 9 |
| 2004 | 5 | 12 |
| 2005 | 2 | 10 |
| 2006 | 10 | 3 |
| 2007 | 7 | 15 |
| 2008 | 0 | 6 |
| 2009 | 1 | 14 |
| 2010 | 18 | 24 |
| 2011 | 10 | 30 |
| 2012 | 9 | 20 |
| 2013 | 18 | 26 |
| 2014 | 24 | 13 |
| 2015 | 12 | 11 |
| 2016 | 17 | 15 |
| 2017 | 11 | 14 |
| 2018 | 10 | 29 |
| 2019 | 13 | 13 |
| 2020 | 25 | 12 |
| 2021 | 9 | 11 |
| 2022 | 5 | 4 |
| 2023 | 8 | 14 |
| 2024 | 8 | 11 |
| 2025 | 4 | 18 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adsorbent, its preparation and use3 Feb 2026US 12,539,502 B2City University of Hong Kong
- Depolymerization of polymers with ester, ether and carbonate linkages using acidic ionic liquid (AIL) catalyst20 Jan 2026US 12,528,929 B2Council of Scientific and Industrial Research An Indian Resgistered Body Incorporated Under the Regn. of Soc. Act (Act Xxi of 1860)
- Method for recycling polyester fabrics with use of ionic liquid catalyst11 Nov 2025US 12,466,934 B2Nan Ya Plastics Corporation
- Catalytic wall-flow filter27 May 2025US 12,312,990 B1Johnson Matthey Public Limited Company
- Heterogeneous catalyst with multicatalytic activity8 Apr 2025US 12,269,019 B2Instituto Mexicano Del Petroleo
- Preparation method of dual-anion catalyst, and use of dual-anion catalyst in catalytic degradation of polyurethane material7 May 2026US 2026/0124609 A1Zhejiang University of Technology
- Method for polyurethane depolymerization19 Mar 2026US 2026/0078235 A1AsociacióN Empresarial Centro TecnolóGico Del Mueble Y La Madera De La RegióN De Murcia
- Catalyst for depolymerizing polycarbonate-based resin, and decomposition method of polycarbonate-based resin, recovery method of catalyst for depolymerizing polycarbonate-based resin using the same5 Feb 2026US 2026/0034539 A1Korea University Research and Business Foundation
- Preparation method of ion catalyst material for pet chemical recycling and pet chemical recycling method8 Jan 2026US 2026/0008036 A1Nan Ya Plastics Corporation
- Method for preparing and separating alkylene carbonate using carbon dioxide in air8 Jan 2026US 2026/0008765 A1Korea Institute of Science and Technology
Most cited
By later US patents
- Low temperature ionic liquids109US 5,731,101 AAkzo Nobel N. V. · 1998
- Functionalized ionic liquids, and methods of use thereof64US 7,208,605 B2University of South Alabama · 2007
- Perfluorinated amide salts and their uses as ionic conducting materials61US 6,319,428 B1Centre National De La Recherche Scientifique · 2001
- Catalytic composition and process for the alkylation of aliphatic hydrocarbons56US 5,750,455 AInstitut Francais du Petrole · 1998
- Non-aqueous liquid composition with an ionic character and its use as a solvent55US 5,104,840 AInstitut Francais du Petrole · 1992