C22B 21/0038
Obtaining aluminium: by other processes
Official title: {by other processes (electrolysis C25C; C22B21/02 and C22B21/04 take precedence)}
C22B21/0038 (Obtaining aluminium: by other processes) appears on 239 US grants and 175 published applications in this corpus.
Search patents in C22B- Granted patents
- 239
- Published applications
- 175
- Assignees
- 181
- Inventors
- 527
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 9 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 8 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 18 | 5 |
| 2002 | 9 | 4 |
| 2003 | 3 | 3 |
| 2004 | 3 | 8 |
| 2005 | 3 | 6 |
| 2006 | 3 | 6 |
| 2007 | 2 | 5 |
| 2008 | 3 | 8 |
| 2009 | 5 | 8 |
| 2010 | 6 | 6 |
| 2011 | 6 | 5 |
| 2012 | 5 | 9 |
| 2013 | 5 | 8 |
| 2014 | 6 | 5 |
| 2015 | 3 | 5 |
| 2016 | 4 | 10 |
| 2017 | 6 | 9 |
| 2018 | 4 | 3 |
| 2019 | 9 | 5 |
| 2020 | 8 | 4 |
| 2021 | 1 | 7 |
| 2022 | 4 | 12 |
| 2023 | 5 | 6 |
| 2024 | 6 | 10 |
| 2025 | 5 | 13 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Enhanced dross feedstock29 Sep 2026US 12,747,485 B2Novelis Inc.
- Processing methods and processing apparatus11 Aug 2026US 12,703,895 B2Altek Europe Limited
- Aluminum alloy-based effervescent tablet for producing enhanced heat transfer suspensions2 Jun 2026US 12,644,165 B1Kuwait University
- Method for producing reduced form of metal oxides14 Apr 2026US 12,601,030 B2K.K. Sun Metalon
- Method of recycling a structure or at least a portion thereof, and component for an aircraft or spacecraft2 Dec 2025US 12,485,482 B2Airbus SAS
- Production of high purity alumina and/or smelter-grade alumina3 Sep 2026US 2026/0257933 A1Andromeda Technologies Holdings Pty Ltd
- Method for producing reduced form of metal oxide23 Jul 2026US 2026/0209886 A1K.K. Sun Metalon
- Integrated devices for drying organic solid wastes and extracting metals and methods thereof9 Jul 2026US 2026/0193540 A1Harbin Normal University
- Battery recycling plant and process14 May 2026US 2026/0135178 A1BASF SE
- Non-destructive method of recycling secondary battery electrode materials using plasma process8 Jan 2026US 2026/0011804 A1Korea Institute of Energy Technology
Most cited
By later US patents
- Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material38US 6,401,635 B1Corenso United Oy Ltd. · 2002
- Metal recovery process from aluminum dross32US 4,386,956 AThe Anaconda Company · 1983
- Method of treating spent potliner material from aluminum reduction cells32US 5,723,097 AGoldendale Aluminum Company · 1998
- Method of applying marking to metal sheet for scrap sorting purposes32US 6,412,642 B2Alcan International Limited · 2002
- Salt cake processing method and apparatus31US 4,073,644 AAlumax Mill Products, Inc. · 1978