C22B 3/381
Phosphines
Official title: {Phosphines, e.g. compounds with the formula PRnH3-n, with n = 0-3}
C22B3/381 (Phosphines) appears on 20 US grants and 14 published applications in this corpus.
Search patents in C22B- Granted patents
- 20
- Published applications
- 14
- Assignees
- 18
- Inventors
- 77
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 3 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for extracting salts and temperature- regenerated extracting composition12 May 2026US 12,623,942 B2Adionics
- Countercurrent rare earth separation process2 Jul 2024US 12,024,756 B2Seren Technologies Limited
- Method for extracting salts and temperature-regenerated extracting composition3 Oct 2023US 11,772,997 B2Adionics
- Rare earth metal oxide process including extracting rare earth metal from acidic solution with an ionic liquid composition2 Aug 2022US 11,401,579 B2Seren Technologies Limited
- Treatment method of chlorine-containing zinc oxide secondary material17 Apr 2018US 9,945,008 B2Yunnan Xiangyunfeilong Resources Recycling Technology Co., Ltd.
- Selective cobalt, manganese and nickel extraction from battery recycling leachate solutions2 Jul 2026US 2026/0185185 A1Ascend Elements, Inc.
- Methods for recovering critical elements from leach solutions17 Oct 2024US 2024/0344170 A1
- Method for extracting salts and temperature-regenerated extracting composition30 Nov 2023US 2023/0382775 A1Adionics
- Countercurrent rare earth separation process16 Sep 2021US 2021/0285072 A1Seren Technologies Limited
- Rare earth metal oxide preparation19 Aug 2021US 2021/0254191 A1Seren Technologies Limited
Most cited
By later US patents
- Aqueous solutions for obtaining metals by reductive deposition60US 6,183,545 B2Daiwa Fine Chemicals Co., Ltd. · 2001
- Catalytic process32US 4,399,312 AJohnson Matthey Public Limited Company · 1983
- Asymmetric ligands useful for transition metal catalyzed bond forming reactions17US 5,739,396 AStanford University · 1998
- Process for the extraction and separation of nickel and/or cobalt14US 5,447,552 AGoro Nickel S.A. · 1995
- Process for hydroformylation with rhodium catalysts and the separation of rhodium therefrom13US 5,091,350 AHoechst Aktiengesellschaft · 1992