C22B 3/3842
Phosphinic acid
Official title: {Phosphinic acid, e.g. H2P(O)(OH)}
C22B3/3842 (Phosphinic acid) appears on 76 US grants and 86 published applications in this corpus.
Search patents in C22B- Granted patents
- 76
- Published applications
- 86
- Assignees
- 84
- Inventors
- 261
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 4 | 0 |
| 2011 | 0 | 2 |
| 2012 | 3 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 4 |
| 2022 | 2 | 7 |
| 2023 | 3 | 15 |
| 2024 | 10 | 16 |
| 2025 | 9 | 14 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrometallurgical recovery method for nickel sulfate26 May 2026US 12,637,736 B2Ecopro Materials Co., Ltd.
- Solvent extraction method using two-stage extraction for separation and recovery of nickel, cobalt, and manganese28 Apr 2026US 12,612,678 B2Ecopro Materials Co., Ltd.
- Method for recycling nickel, cobalt and manganese from feed liquid containing nickel, cobalt and manganese28 Apr 2026US 12,612,681 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Method for recovering active metal of lithium secondary battery10 Feb 2026US 12,545,974 B2SK Innovation Co., Ltd.
- Process for preparing a high-purity nickel sulphate solution30 Dec 2025US 12,509,361 B2Umicore AG & Co. KG
- Selective separation of metals from mineral-rich concentrates6 Aug 2026US 2026/0226585 A1US Metals Refining Group, Inc.
- Method for removing the actinium contained in a rare earth solution with an organophosphorus solvent and rare earth compositions obtained by this method30 Jul 2026US 2026/0218335 A1Carester
- Method for treating an electronic waste and recovering valuable metals and rare earth elements therefrom23 Jul 2026US 2026/0213292 A1Institut National De La Recherche Scientifique
- Compositions and processes for removing heavy metals from phosphoric acid containing streams9 Jul 2026US 2026/0193083 A1Cytec Industries Inc.
- Selective cobalt, manganese and nickel extraction from battery recycling leachate solutions2 Jul 2026US 2026/0185185 A1Ascend Elements, Inc.
Most cited
By later US patents
- Recovery of gold from aqueous solutions51US 4,913,730 ACanadian Patents and Development Limited · 1990
- Chloride assisted hydrometallurgical extraction of metal42US 5,902,474 ACominco Engineering Services Ltd. · 1999
- Process for producing electrolytic manganese dioxide from geothermal brines38US 6,682,644 B2MidAmerican Energy Holdings Company · 2004
- Method of recovering metal from metalliferous waste37US 3,966,569 AMX Processor Reinhardt & Co. AB · 1976
- Chloride assisted hydrometallurgical extraction of metal34US 5,869,012 ACominco Engineering Services Ltd. · 1999