C22B 47/0081
Treatment or purification of solutions
Official title: {Treatment or purification of solutions, e.g. obtained by leaching (C22B47/0054 takes precedence)}
C22B47/0081 (Treatment or purification of solutions) appears on 47 US grants and 33 published applications in this corpus.
Search patents in C22B- Granted patents
- 47
- Published applications
- 33
- Assignees
- 45
- Inventors
- 118
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 3 |
| 2016 | 2 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 5 |
| 2024 | 2 | 3 |
| 2025 | 4 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Treatment process for crystallizing a metal sulfate14 Oct 2025US 12,441,621 B2Hatch Ltd.
- Method for recycling lithium batteries9 Sep 2025US 12,412,941 B2Duesenfeld GmbH
- Process for the recovery of cathode materials in the recycling of batteries5 Aug 2025US 12,381,268 B2Northvolt AB
- Process for the recovery of metals from oxidic ores4 Feb 2025US 12,215,407 B2Umicore AG & Co. KG
- Method for producing aqueous solution containing nickel, cobalt and manganese10 Dec 2024US 12,163,204 B2Kemco
- Method for recycling lithium batteries19 Mar 2026US 2026/0081249 A1Duesenfeld GmbH
- Treatment process for crystallizing a metal sulfate12 Mar 2026US 2026/0070803 A1Hatch Ltd.
- Process for selectively capturing chemical elements from a polymetallic sample26 Feb 2026US 2026/0055006 A1Centre National De La Recherche Scientifique
- Process for generating a metal-containing aqueous solution12 Jun 2025US 2025/0188567 A1
- A method for purification of manganese pregnant leach solution27 Feb 2025US 2025/0066217 A1Mn Energy Limited
Most cited
By later US patents
- Method for separating metal constituents from ocean floor nodules46US 4,042,664 ADeepsea Ventures, Inc. · 1977
- Process for producing electrolytic manganese dioxide from geothermal brines38US 6,682,644 B2MidAmerican Energy Holdings Company · 2004
- Manganese nitrate spray decomposition19US 4,310,494 AChemetals Corporation · 1982
- Recovering metal values from marine manganese nodules17US 4,123,499 AChemetals Corporation · 1978
- Process for removing manganese from solutions including aqueous industrial waste15US 5,441,641 A1995