C22B 23/0453
Treatment or purification of solutions
Official title: {Treatment or purification of solutions, e.g. obtained by leaching (C22B23/0407 takes precedence)}
C22B23/0453 (Treatment or purification of solutions) appears on 419 US grants and 577 published applications in this corpus.
Search patents in C22B- Granted patents
- 419
- Published applications
- 577
- Assignees
- 291
- Inventors
- 1,245
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 9 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 0 |
| 2002 | 13 | 6 |
| 2003 | 3 | 3 |
| 2004 | 9 | 5 |
| 2005 | 2 | 9 |
| 2006 | 2 | 8 |
| 2007 | 3 | 11 |
| 2008 | 5 | 14 |
| 2009 | 7 | 16 |
| 2010 | 11 | 20 |
| 2011 | 12 | 17 |
| 2012 | 9 | 12 |
| 2013 | 16 | 15 |
| 2014 | 12 | 14 |
| 2015 | 16 | 27 |
| 2016 | 10 | 16 |
| 2017 | 13 | 10 |
| 2018 | 14 | 12 |
| 2019 | 12 | 8 |
| 2020 | 13 | 15 |
| 2021 | 7 | 22 |
| 2022 | 8 | 24 |
| 2023 | 11 | 57 |
| 2024 | 34 | 78 |
| 2025 | 36 | 92 |
| 2026 | 21 | 66 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for separating nickel from lithium, and application thereof22 Sep 2026US 12,742,225 B2Suzhou Botree Cycling Sci & Tech Co., Ltd
- Methods for battery-grade aqueous solutions of nickel salts18 Aug 2026US 12,709,552 B2Bluegrass Infrastructure Partners Holdings, LLC
- Method for recovering valuable materials from batteries7 Jul 2026US 12,676,351 B2University of Kentucky Research Foundation
- Comprehensive utilization method for valuable elements in hydrometallurgical slag of laterite nickel ore23 Jun 2026US 12,662,715 B2Gem Co., Ltd.
- Production method for cobalt sulfate26 May 2026US 12,637,361 B2Sumitomo Metal Mining Co., Ltd.
- Methods for carbon capture and metal recovery and related systems24 Sep 2026US 2026/0284595 A1Battelle Energy Alliance, LLC
- Recovery of lithium from black mass24 Sep 2026US 2026/0285700 A1Metso Finland Oy
- Process for extracting nickel from gasifier slag24 Sep 2026US 2026/0285702 A1Reliance Industries Limited
- Method for the recovery of metals from e-waste10 Sep 2026US 2026/0265859 A1Renewable Metals Pty Ltd
- System and method for reducing moisture content and impurity content of nickel cobalt hydroxide27 Aug 2026US 2026/0250153 A1Gem Co., Ltd.
Most cited
By later US patents
- Chloride assisted hydrometallurgical copper extraction52US 5,431,788 ACominco Engineering Services Ltd. · 1995
- Chloride assisted hydrometallurgical extraction of metal42US 5,902,474 ACominco Engineering Services Ltd. · 1999
- Production of metal nanoparticles42US 7,749,299 B2Cabot Corporation · 2010
- Chloride assisted hydrometallurgical extraction of metal34US 5,869,012 ACominco Engineering Services Ltd. · 1999
- Chloride assisted hydrometallurgical extraction of metal33US 5,650,057 ACominco Engineering Services Ltd. · 1997