C22B 3/382
Phosphine chalcogenides
Official title: {Phosphine chalcogenides, e.g. compounds of the formula R3P=X with X = O, S, Se or Te}
C22B3/382 (Phosphine chalcogenides) appears on 39 US grants and 20 published applications in this corpus.
Search patents in C22B- Granted patents
- 39
- Published applications
- 20
- Assignees
- 34
- Inventors
- 112
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 2 |
| 2023 | 1 | 8 |
| 2024 | 0 | 2 |
| 2025 | 4 | 2 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for the removal of heavy metals from a phosphoric acid containing composition using a flocculating agent10 Feb 2026US 12,545,582 B2Yara International Asa
- Process for the removal of heavy metals from a phosphoric acid containing composition10 Feb 2026US 12,545,583 B2Yara International Asa
- Process for the removal of heavy metals from a phosphoric acid containing composition using an ionic polymeric surfactant and use of said surfactant in the precipitation of heavy metals in a phosphoric acid containing composition10 Feb 2026US 12,545,584 B2Yara International Asa
- Method for treating solid hazardous heavy metal-containing compositions30 Dec 2025US 12,508,636 B2Yara International Asa
- Method for lithium recovery by extraction-stripping separation and purification25 Nov 2025US 12,480,179 B2Institute of Process Engineering, Chinese Academy of Sciences
- Method for recovering lithium from waste lithium ion batteries3 Jul 2025US 2025/0219177 A1Asaka Riken Co., Ltd.
- Method for manufacturing battery material6 Feb 2025US 2025/0046900 A1Prime Planet Energy & Solutions, Inc.
- Method for reducing waste by recovering transition metals from lithium secondary battery25 Jan 2024US 2024/0030510 A1SK Innovation Co., Ltd.
- Method and composition for liquid-liquid extraction4 Jan 2024US 2024/0001300 A1Molten Salt Solutions, LLC
- Method for preparing pretreated product for recovering valuable metals of lithium secondary battery28 Dec 2023US 2023/0420761 A1SK Innovation Co., Ltd.
Most cited
By later US patents
- Method for extracting lanthanides and actinides from acid solutions45US 4,548,790 AThe United States of America as represented by the United States Department of Energy · 1985
- Method for extracting lanthanides and actinides from acid solutions by modification of purex solvent31US 4,574,072 AThe United States of America as represented by the United States Department of Energy · 1986
- Separation of rare earth values by liquid/liquid extraction28US 5,192,443 ARhone-Poulenc Chimie · 1993
- Liquid-liquid extraction of rare earth/uranium/thorium values21US 4,461,748 ARhone-Poulenc Specialites Chimiques · 1984
- Process for preventing the extraction of technetium and/or rhenium, particularly during the extraction of uranium and/or plutonium by an organic solvent11US 4,764,352 ACommissariat A L' Energie Atomique · 1988