C07C 2531/24
Phosphines
C07C2531/24 (Phosphines) appears on 580 US grants and 471 published applications in this corpus.
Search patents in C07C- Granted patents
- 580
- Published applications
- 471
- Assignees
- 258
- Inventors
- 1,193
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 10 | 0 |
| 1978 | 16 | 0 |
| 1979 | 14 | 0 |
| 1980 | 8 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 13 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 15 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 10 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 2 |
| 2002 | 5 | 3 |
| 2003 | 6 | 8 |
| 2004 | 6 | 5 |
| 2005 | 4 | 19 |
| 2006 | 12 | 12 |
| 2007 | 7 | 17 |
| 2008 | 10 | 14 |
| 2009 | 13 | 14 |
| 2010 | 5 | 18 |
| 2011 | 13 | 15 |
| 2012 | 11 | 22 |
| 2013 | 14 | 19 |
| 2014 | 14 | 19 |
| 2015 | 24 | 37 |
| 2016 | 29 | 38 |
| 2017 | 34 | 33 |
| 2018 | 24 | 34 |
| 2019 | 39 | 24 |
| 2020 | 23 | 17 |
| 2021 | 17 | 14 |
| 2022 | 22 | 25 |
| 2023 | 20 | 23 |
| 2024 | 16 | 16 |
| 2025 | 5 | 16 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for linear alpha olefins production15 Sep 2026US 12,735,371 B2Sabic Global Technologies B.V.
- Processes for producing cyclic olefins from polymers and re-polymerization thereof9 Jun 2026US 12,649,840 B2ExxonMobil Chemical Patents Inc.
- Sustainable aviation fuel from normal alpha olefin byproducts and process for same3 Feb 2026US 12,540,287 B2Chevron Phillips Chemical Company LP
- Ligands for production of 1-octene in chromium assisted ethylene oligomerization process14 Oct 2025US 12,440,830 B2Sabic Global Technologies B.V.
- Method and device for preparing adiponitrile7 Oct 2025US 12,435,033 B2Zhejiang Nhu Company Ltd.
- Processes for producing cyclic olefins from polymers and re-polymerization thereof24 Sep 2026US 2026/0286085 A1
- Ethylene oligomerization method with reduced polymer generation and improved productivity6 Aug 2026US 2026/0225976 A1
- Oligomerization process11 Jun 2026US 2026/0159459 A1Shell Oil Comapny
- Sustainable aviation fuel from normal alpha olefin byproducts and process for same16 Apr 2026US 2026/0103649 A1Chevron Phillips Chemical Company LP
- Process for the preparation of bio-based olefins from primary alcohol5 Mar 2026US 2026/0062361 A1BASF SE
Most cited
By later US patents
- Ligands for metals and improved metal-catalyzed processes based thereon143US 6,307,087 B1Massachusetts Institute of Technology · 2001
- Ethylene trimerization100US 5,811,618 AAmoco Corporation · 1998
- Ligands for metals and improved metal-catalyzed processes based thereon83US 6,946,560 B2Massachusetts Institute of Technology · 2005
- Ligands for metals and improved metal-catalyzed processes based thereon80US 7,026,498 B2Massachusetts Institute of Technology · 2006
- Ligands for metals and improved metal-catalyzed processes based thereon80US 7,247,731 B2Massachusetts Institute of Technology · 2007