C25C 3/06
Electrolytic production, recovery or refining of metals by electrolysis of melts: of
Official title: of aluminium
C25C3/06 (Electrolytic production, recovery or refining of metals by electrolysis of melts: of) appears on 1,186 US grants and 665 published applications in this corpus.
Search patents in C25C- Granted patents
- 1,186
- Published applications
- 665
- Assignees
- 411
- Inventors
- 1,810
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 35 | 0 |
| 1978 | 33 | 0 |
| 1979 | 33 | 0 |
| 1980 | 31 | 0 |
| 1981 | 27 | 0 |
| 1982 | 23 | 0 |
| 1983 | 36 | 0 |
| 1984 | 72 | 0 |
| 1985 | 52 | 0 |
| 1986 | 52 | 0 |
| 1987 | 35 | 0 |
| 1988 | 32 | 0 |
| 1989 | 20 | 0 |
| 1990 | 19 | 0 |
| 1991 | 19 | 0 |
| 1992 | 22 | 0 |
| 1993 | 8 | 0 |
| 1994 | 30 | 0 |
| 1995 | 20 | 0 |
| 1996 | 21 | 0 |
| 1997 | 15 | 0 |
| 1998 | 19 | 0 |
| 1999 | 21 | 0 |
| 2000 | 28 | 0 |
| 2001 | 22 | 10 |
| 2002 | 41 | 22 |
| 2003 | 30 | 33 |
| 2004 | 24 | 43 |
| 2005 | 16 | 30 |
| 2006 | 14 | 28 |
| 2007 | 13 | 35 |
| 2008 | 17 | 30 |
| 2009 | 10 | 25 |
| 2010 | 20 | 22 |
| 2011 | 21 | 26 |
| 2012 | 18 | 17 |
| 2013 | 14 | 41 |
| 2014 | 16 | 39 |
| 2015 | 16 | 28 |
| 2016 | 21 | 30 |
| 2017 | 22 | 21 |
| 2018 | 21 | 19 |
| 2019 | 16 | 20 |
| 2020 | 12 | 16 |
| 2021 | 20 | 14 |
| 2022 | 11 | 20 |
| 2023 | 11 | 15 |
| 2024 | 15 | 35 |
| 2025 | 15 | 27 |
| 2026 | 9 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing highB purity aluminum from aluminum chloride25 Aug 2026US 12,715,778 B2Aluminum Technologies, LLC
- System and process for starting up an electrolytic cell4 Aug 2026US 12,698,567 B2Elysis Limited Partnership
- System and process for sustainable electrowinning of metal16 Jun 2026US 12,655,533 B2Case Western Reserve University
- Method and apparatus for producing aluminum material31 Mar 2026US 12,590,378 B2Uacj Corporation
- Integrated process of pyrolysis, electrode anode production and aluminum production and joint plant31 Mar 2026US 12,590,379 B2BASF SE
- Method of starting up an electrolytic cell for aluminum production8 Oct 2026US 2026/0308793 A1Rio Tinto Alcan International Limited
- System and method for collecting and pre-treating process gases generated by an electrolysis cell6 Aug 2026US 2026/0226642 A1Elysis Limited Partnership
- An aluminum electrolysis cell30 Jul 2026US 2026/0218405 A1Central South University
- Method and device for electro chemical refining of aluminium in cells (variants)16 Jul 2026US 2026/0201589 A1
- Scrap Aluminum Alloy Purification Process11 Jun 2026US 2026/0159977 A1Apple Inc.
Most cited
By later US patents
- Apparatus and method for the electrolytic production of metals89US 4,999,097 AMassachusetts Institute of Technology · 1991
- Non-consumable anode and lining for aluminum electrolytic reduction cell73US 5,284,562 ABrooks Rand Inc · 1994
- Product and process for the activation of an electrolytic cell64US 4,575,407 A1986
- Refractory metal borides and composites containing them64US 4,595,545 AEltech Systems Corporation · 1986
- Aluminum reduction cell electrode63US 4,405,433 AKaiser Aluminum & Chemical Corporation · 1983