B01J 31/248
Bridged ring systems
Official title: {Bridged ring systems, e.g. 9-phosphabicyclononane}
B01J31/248 (Bridged ring systems) appears on 65 US grants and 57 published applications in this corpus.
Search patents in B01J- Granted patents
- 65
- Published applications
- 57
- Assignees
- 36
- Inventors
- 123
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 4 | 6 |
| 2003 | 4 | 5 |
| 2004 | 9 | 7 |
| 2005 | 1 | 6 |
| 2006 | 4 | 3 |
| 2007 | 4 | 3 |
| 2008 | 3 | 0 |
| 2009 | 3 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 3 |
| 2014 | 2 | 1 |
| 2015 | 5 | 5 |
| 2016 | 3 | 3 |
| 2017 | 3 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrogen storage based on aqueous formate- bicarbonate (hydrogen carbonate) equilibrium9 Jun 2026US 12,649,654 B2Hydrogen Revolution Hungary Kft.
- Tri-(adamantyl) phosphines and applications thereof3 Feb 2026US 12,539,508 B2The Trustees of Princeton University
- Tri-(adamantyl)phosphines and applications thereof24 Oct 2023US 11,794,180 B2The Trustees of Princeton University
- Tri-(adamantyl)phosphines and applications thereof21 Feb 2023US 11,583,844 B2The Trustees of Princeton University
- Tri-(adamantyl)phosphines and applications thereof20 Apr 2021US 10,981,157 B2The Trustees of Princeton University
- Catalyst system and method for carbonylation reaction23 Jul 2026US 2026/0208174 A1Shandong Nhu Fine Chemical Science and Technology Company Ltd.
- Tri-(adamantyl)phosphines and applications thereof16 Apr 2026US 2026/0102762 A1The Trustees of Princeton University
- Hydrogen storage based on aqueous formate-bicarbonate (hydrogen carbonate) equilibrium3 Oct 2024US 2024/0327207 A1Geomax Project Kft.
- Tri-(adamantyl)phosphines and applications thereof4 Jan 2024US 2024/0001353 A1The Trustees of Princeton University
- Tri-(adamantyl)phosphines and applications thereof25 May 2023US 2023/0158480 A1The Trustees of Princeton University
Most cited
By later US patents
- 3,4-dimethyl-2,5,6-tris(p-sulfonatophenyl)-1-phosphanorbornadiene, process for the preparation thereof and process for the hydroformylation of olefinnically unsaturated compounds32US 5,312,951 AHoechst Aktiengesellschaft · 1994
- Silylated ferrocenyldiphosphines, silylated ferrocenyldiphosphines bound to inorganic or polymeric organic supports and also metal complexes thereof, their preparation and uses21US 5,783,715 ANovartis AG · 1998
- Phosphorous containing ligands for metathesis catalysts21US 7,276,616 B2Sasol Technology (UK) Limited · 2007
- Linearized level-shifting amplifier19US 5,307,024 ATektronix, Inc. · 1994
- Diphosphines19US 6,156,934 AShell Oil Company · 2000