B01J 31/2442
Comprising condensed ring systems
Official title: {comprising condensed ring systems}
B01J31/2442 (Comprising condensed ring systems) appears on 378 US grants and 286 published applications in this corpus.
Search patents in B01J- Granted patents
- 378
- Published applications
- 286
- Assignees
- 190
- Inventors
- 856
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 17 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 19 | 0 |
| 1999 | 18 | 0 |
| 2000 | 17 | 0 |
| 2001 | 19 | 3 |
| 2002 | 13 | 13 |
| 2003 | 15 | 16 |
| 2004 | 15 | 26 |
| 2005 | 9 | 14 |
| 2006 | 13 | 11 |
| 2007 | 12 | 15 |
| 2008 | 8 | 2 |
| 2009 | 7 | 10 |
| 2010 | 8 | 7 |
| 2011 | 2 | 6 |
| 2012 | 2 | 4 |
| 2013 | 6 | 11 |
| 2014 | 8 | 10 |
| 2015 | 13 | 12 |
| 2016 | 12 | 14 |
| 2017 | 9 | 10 |
| 2018 | 6 | 14 |
| 2019 | 10 | 13 |
| 2020 | 13 | 9 |
| 2021 | 10 | 14 |
| 2022 | 10 | 10 |
| 2023 | 12 | 18 |
| 2024 | 5 | 12 |
| 2025 | 6 | 7 |
| 2026 | 6 | 5 |
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.
- Enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines in presence of a chiral iridium catalyst2 Jun 2026US 12,643,860 B2Bayer Aktiengesellschaft
- Air-stable ni(0)-olefin complexes and their use as catalysts or precatalysts24 Feb 2026US 12,558,677 B2Studiengesellschaft Kohle mbH
- Hydrogenation of l-sorbose24 Feb 2026US 12,559,446 B2BASF SE
- Tri-(adamantyl) phosphines and applications thereof3 Feb 2026US 12,539,508 B2The Trustees of Princeton University
- Design and synthesis of electron-rich phosphine ligands for selective, sustainable cross-coupling reactions1 Oct 2026US 2026/0295571 A1The Curators of the University of Missouri
- Ammonia synthesis catalyst, ammonia production device, and ammonia production method6 Aug 2026US 2026/0225088 A1Idemitsu Kosan Co., Ltd.
- 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
- Enantioselective hydrogenation of 4-substituted 1,2-dihydroquinolines in presence of a chiral iridium catalyst15 Jan 2026US 2026/0015326 A1Bayer Aktiengesellschaft
Most cited
By later US patents
- Substituted aminomethylphosphines, compositions and coordination complexes of same, their synthesis and processes using same82US 6,043,363 ASymyx Technologies, Inc. · 2000
- Substituted aminomethylphosphines, coordination complexes of aminomethylphosphines and their synthesis77US 6,034,240 ASymyx Technologies, Inc. · 2000
- Ruthenium-phosphine complex53US 4,691,037 ATakasago Perfumery Co., Ltd. · 1987
- Low pressure rhodium catalyzed hydroformylation of olefins53US 4,960,949 AEastman Kodak Company · 1990
- Sulfonated 2,2'-bis (diphenylphosphinomethyl)-1,1'-binaphthalenes, process for their preparation and their use in a process for the hydroformylation of olefinically unsaturated compounds51US 5,347,045 AHoechst Aktiengesellschaft · 1994