B01J 31/1845
The ligands containing phosphorus
Official title: {the ligands containing phosphorus (phosphines B01J31/24)}
B01J31/1845 (The ligands containing phosphorus) appears on 854 US grants and 567 published applications in this corpus.
Search patents in B01J- Granted patents
- 854
- Published applications
- 567
- Assignees
- 290
- Inventors
- 1,611
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 8 | 0 |
| 1978 | 19 | 0 |
| 1979 | 10 | 0 |
| 1980 | 17 | 0 |
| 1981 | 26 | 0 |
| 1982 | 12 | 0 |
| 1983 | 15 | 0 |
| 1984 | 12 | 0 |
| 1985 | 16 | 0 |
| 1986 | 10 | 0 |
| 1987 | 12 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 12 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 17 | 0 |
| 1997 | 14 | 0 |
| 1998 | 31 | 0 |
| 1999 | 22 | 0 |
| 2000 | 28 | 0 |
| 2001 | 26 | 5 |
| 2002 | 22 | 18 |
| 2003 | 18 | 27 |
| 2004 | 21 | 25 |
| 2005 | 27 | 13 |
| 2006 | 19 | 26 |
| 2007 | 12 | 23 |
| 2008 | 9 | 16 |
| 2009 | 15 | 22 |
| 2010 | 11 | 12 |
| 2011 | 19 | 21 |
| 2012 | 13 | 12 |
| 2013 | 13 | 12 |
| 2014 | 14 | 19 |
| 2015 | 25 | 41 |
| 2016 | 33 | 41 |
| 2017 | 34 | 29 |
| 2018 | 22 | 30 |
| 2019 | 36 | 18 |
| 2020 | 21 | 15 |
| 2021 | 17 | 20 |
| 2022 | 19 | 35 |
| 2023 | 16 | 25 |
| 2024 | 22 | 27 |
| 2025 | 13 | 25 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01J 31/185Phosphites , their isomeric phosphonates and ro-substitution derivatives thereof483
- B01J 31/1875Phosphinites271
- B01J 31/1865Phosphonites , their isomeric phosphinates and ro-substitution derivatives thereof103
- B01J 31/1885Ligands comprising two different formal oxidation states of phosphorus in one at15
Recent patents
- Preparation of organosilicon compounds with carbinol functionality6 Oct 2026US 12,753,193 B2Dow Global Technologies LLC
- Preparation of amino-functional organosilicon compounds15 Sep 2026US 12,735,440 B2Dow Global Technologies LLC
- Catalyst composition for oligomerization reaction11 Aug 2026US 12,702,971 B2Sabic Global Technologies B.V.
- Processes to improve catalytic metal accountability in hydroformylation processes4 Aug 2026US 12,698,251 B2Dow Technology Investments LLC
- Access to chiral bisphenol (BPOL) ligands through desymmetrizing asymmetric ortho-selective mono-halogenation26 May 2026US 12,637,403 B2The Chinese University of Hong Kong
- Process for improving rhodium/phosphite-based homogenous hydroformylation catalyst activity8 Oct 2026US 2026/0308098 A1Dow Technology Investments LLC
- Preparation of amino-functional organosilicon compounds8 Oct 2026US 2026/0308182 A1Dow Global Technologies LLC
- Mesoporous nickel powder and preparation method therefor, nickel-phosphorus catalyst system and adiponitrile preparation method3 Sep 2026US 2026/0257212 A1Shandong Nhu Fine Chemical Science and Technology Company Ltd.
- Ligand Compound, Organic Chromium Compound, and Catalyst Compositions Containing the Same3 Sep 2026US 2026/0257213 A1LG Chem.Ltd.
- Catalyst system and method for carbonylation reaction23 Jul 2026US 2026/0208174 A1Shandong Nhu Fine Chemical Science and Technology Company Ltd.
Most cited
By later US patents
- Transition metal complex catalyzed processes126US 4,769,498 AUnion Carbide Corporation · 1988
- Transition metal complex catalyzed processes112US 4,668,651 AUnion Carbide Corporation · 1987
- Hydroformylation process97US 5,288,918 AUnion Carbide Chemicals & Plastics Technology Corporation · 1994
- Hydrocyanation process and multidentate phosphite and nickel catalyst composition therefor93US 5,512,696 AE. I. Du Pont de Nemours and Company · 1996
- Transition metal complex catalyzed reactions89US 4,599,206 AUnion Carbide Corporation · 1986