B01J 2540/42
Quaternary ammonium groups
B01J2540/42 (Quaternary ammonium groups) appears on 21 US grants and 25 published applications in this corpus.
Search patents in B01J- Granted patents
- 21
- Published applications
- 25
- Assignees
- 23
- Inventors
- 65
- Latest grant
- 12 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 4 |
| 2014 | 0 | 4 |
| 2015 | 3 | 2 |
| 2016 | 6 | 2 |
| 2017 | 3 | 3 |
| 2018 | 0 | 0 |
| 2019 | 3 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Zwitterion-ruthenium complex for catalytic aerobic oxidation reactions12 Apr 2022US 11,298,694 B2The Chinese University of Hong Kong
- Ion pair catalysis of tungstate and molybdate14 Jul 2020US 10,710,061 B2Nanyang Technological University
- Catalytic carbonylation catalysts and methods19 Nov 2019US 10,479,861 B2Novomer, Inc.
- Method of development and use of catalyst-functionalized catalytic particles to increase the mass transfer rate of solvents used in acid gas cleanup18 Jun 2019US 10,322,367 B2University of Kentucky Research Foundation
- Catalytic carbonylation catalysts and methods5 Mar 2019US 10,221,278 B2Novomer, Inc.
- Metal-containing peptoid membranes for hydrolysis of organophosphates27 Mar 2025US 2025/0099947 A1
- Pincer-based cobalt catalysts for hydrogenation reaction and its process of preparation thereof26 Dec 2024US 2024/0424489 A1
- Process to continuously prepare a cyclic carbonate8 Dec 2022US 2022/0388973 A1New Green World B.V.
- Lubricating oil composition for automobile transmission fluids and method for producing the same2 Jun 2022US 2022/0169943 A1Mitsui Chemicals, Inc.
- Zwitterion-ruthenium complex for catalytic aerobic oxidation reactions29 Apr 2021US 2021/0121862 A1The Chinese University of Hong Kong
Most cited
By later US patents
- Acid activation of ruthenium metathesis catalysts and living ROMP metathesis polymerization in water65US 6,284,852 B1California Institute of Technology · 2001
- Catalytic carbonylation catalysts and methods55US 9,327,280 B2Novomer, Inc. · 2016
- Catalytic carbonylation catalysts and methods36US 10,221,278 B2Novomer, Inc. · 2019
- Acid activation of ruthenium metathesis catalysts and living ROMP metathesis polymerization in water26US 6,486,279 B2California Institute of Technology · 2002
- Transition metal recovery21US 5,114,473 AUnion Carbide Chemicals & Plastics Technology Corporation · 1992