C22B 21/0015
Obtaining aluminium: by wet processes
Official title: {by wet processes (C22B21/02, C22B21/04 and C22B21/06 take precedence)}
C22B21/0015 (Obtaining aluminium: by wet processes) appears on 157 US grants and 228 published applications in this corpus.
Search patents in C22B- Granted patents
- 157
- Published applications
- 228
- Assignees
- 162
- Inventors
- 573
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 2 | 2 |
| 2011 | 0 | 4 |
| 2012 | 6 | 3 |
| 2013 | 4 | 5 |
| 2014 | 1 | 11 |
| 2015 | 8 | 14 |
| 2016 | 8 | 16 |
| 2017 | 7 | 8 |
| 2018 | 6 | 2 |
| 2019 | 3 | 4 |
| 2020 | 9 | 8 |
| 2021 | 6 | 14 |
| 2022 | 7 | 9 |
| 2023 | 5 | 25 |
| 2024 | 7 | 31 |
| 2025 | 15 | 31 |
| 2026 | 13 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for removing elemental copper from ternary battery waste and application thereof14 Jul 2026US 12,683,208 B2Guangdong Brunp Recycling Technology Co., Ltd.
- Comprehensive utilization method for valuable elements in hydrometallurgical slag of laterite nickel ore23 Jun 2026US 12,662,715 B2Gem Co., Ltd.
- Binder composition for secondary battery21 Apr 2026US 12,605,926 B2Grst Singapore Pte. Ltd.
- Method for efficiently removing fluorine from spent lithium battery21 Apr 2026US 12,606,885 B2Guangdong Brunp Recycling Technology Co., Ltd.
- System and method for regulating aluminum precipitation during high-pressure acid leaching of laterite nickel ore7 Apr 2026US 12,595,530 B2Gem Co., Ltd.
- Lime and hydraulic cement manufacture by electrolysis using hyaloclastite or lava, carbon mineralization by hyaloclastite or lava electrolysis and method of making and using same8 Oct 2026US 2026/0308006 A1Greencraft LLC
- Method for recovering metals from waste battery using magnetic field applied biological leaching process10 Sep 2026US 2026/0265858 A1Ak Tree Co., Ltd.
- Production of high purity alumina and/or smelter-grade alumina3 Sep 2026US 2026/0257933 A1Andromeda Technologies Holdings Pty Ltd
- Process for producing high purity aluminium materials13 Aug 2026US 2026/0234015 A1HiPurA Pty Ltd
- A method for the preparation of alumina13 Aug 2026US 2026/0234017 A1Playa One Pty Ltd
Most cited
By later US patents
- Process for removal of silica from geothermal brine72US 4,016,075 ASouthern Pacific Land Co. · 1977
- Process for recovering mineral values from fly ash26US 4,130,627 A1978
- Method of separately recovering metal values of petroleum refining catalyst26US 4,861,565 AThe Hall Chemical Company · 1989
- Processes for extracting aluminum and iron from aluminous ores23US 7,837,961 B2Exploration Orbite VSPA Inc. · 2010
- Method and device for recovery of scrap goods22US 5,139,203 A1992