B01J 2540/54
Quaternary phosphonium groups
B01J2540/54 (Quaternary phosphonium groups) appears on 15 US grants and 18 published applications in this corpus.
Search patents in B01J- Granted patents
- 15
- Published applications
- 18
- Assignees
- 18
- Inventors
- 41
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 2 | 0 |
| 2016 | 2 | 1 |
| 2017 | 1 | 2 |
| 2018 | 0 | 0 |
| 2019 | 3 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 3 |
| 2022 | 2 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ylide-functionalised phosphanes for use in metal complexes and homogeneous catalysis13 Jan 2026US 12,521,704 B2Umicore AG & Co. KG
- Optically pure enantiomers of ruthenium complexes and uses thereof17 Dec 2024US 12,168,224 B2Centre National De La Recherche Scientifique
- Organoruthenium carbide complexes as precatalysts for olefin metathesis17 Jan 2023US 11,554,365 B2Apeiron Synthesis S. A.
- Zwitterion-ruthenium complex for catalytic aerobic oxidation reactions12 Apr 2022US 11,298,694 B2The Chinese University of Hong Kong
- Organoruthenium carbide complexes as precatalysts for olefin metathesis5 Apr 2022US 11,291,983 B2Apeiron Synthesis S. A.
- Ylide-functionalized phosphanes for use in metal complexes and homogeneous catalysis30 Apr 2026US 2026/0115706 A1Umicore AG & Co. KG
- Organometallic compounds, and preparation and use thereof12 Jun 2025US 2025/0188107 A1Umicore AG & Co. KG
- Optically pure enantiomers of ruthenium complexes and uses thereof20 Jun 2024US 2024/0198321 A1Centre National De La Recherche Scientifique
- Ylide-functionalised phosphanes for use in metal complexes and homogeneous catalysis9 May 2024US 2024/0149256 A1Umicore AG & Co. KG
- Algae cultivation medium and method of increasing carbon shuttling in an algae cultivation medium22 Dec 2022US 2022/0403321 A1University of Kentucky Research Foundation
Most cited
By later US patents
- Catalytic carbonylation catalysts and methods55US 9,327,280 B2Novomer, Inc. · 2016
- Catalytic carbonylation catalysts and methods36US 10,221,278 B2Novomer, Inc. · 2019
- Phosphine and phosphonium compounds and catalysts7US 4,473,505 AExxon Research & Engineering Co. · 1984
- Catalytic oxidation of sulphide species6US 8,986,638 B2Friedrich-Alexander-Universitaet Erlanden-Nuernberg · 2015
- Catalytic carbonylation catalysts and methods4US 10,479,861 B2Novomer, Inc. · 2019