C22B 21/06
Refining
Official title: refining {(electrolytic refining C25C; C22B21/0046, C22B21/0061 take precedence)}
C22B21/06 (Refining) appears on 481 US grants and 284 published applications in this corpus.
Search patents in C22B- Granted patents
- 481
- Published applications
- 284
- Assignees
- 220
- Inventors
- 830
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 15 | 0 |
| 1978 | 13 | 0 |
| 1979 | 16 | 0 |
| 1980 | 8 | 0 |
| 1981 | 12 | 0 |
| 1982 | 6 | 0 |
| 1983 | 14 | 0 |
| 1984 | 10 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 14 | 0 |
| 1990 | 9 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 6 | 0 |
| 1994 | 15 | 0 |
| 1995 | 12 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 8 | 0 |
| 2000 | 17 | 0 |
| 2001 | 13 | 6 |
| 2002 | 17 | 13 |
| 2003 | 11 | 11 |
| 2004 | 10 | 10 |
| 2005 | 5 | 7 |
| 2006 | 1 | 12 |
| 2007 | 3 | 7 |
| 2008 | 7 | 12 |
| 2009 | 9 | 16 |
| 2010 | 12 | 22 |
| 2011 | 6 | 11 |
| 2012 | 16 | 11 |
| 2013 | 6 | 14 |
| 2014 | 8 | 10 |
| 2015 | 7 | 18 |
| 2016 | 14 | 17 |
| 2017 | 11 | 15 |
| 2018 | 11 | 6 |
| 2019 | 14 | 4 |
| 2020 | 7 | 13 |
| 2021 | 10 | 5 |
| 2022 | 2 | 6 |
| 2023 | 4 | 12 |
| 2024 | 3 | 8 |
| 2025 | 4 | 8 |
| 2026 | 3 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multi-component flux11 Aug 2026US 12,703,050 B2Pyrotek, Inc.
- Metal removal method and metal recovery method30 Jun 2026US 12,668,855 B2Kabushiki Kaisha Toyota Chuo Kenkyusho
- Aluminum alloy-based effervescent tablet for producing enhanced heat transfer suspensions2 Jun 2026US 12,644,165 B1Kuwait University
- Degassing launder28 Oct 2025US 12,454,738 B2Pyrotek, Inc.
- Methods of recycling aluminum alloys and purification thereof24 Jun 2025US 12,338,507 B2Alcoa USA Corp.
- Apparatus and method for fractionating alloy components in recycled alloy8 Oct 2026US 2026/0308715 A1Hyundai Motor Company
- Production method for baseball bats based on 6-series recycled aluminum25 Jun 2026US 2026/0176715 A1Zhongshan Arthur Melody Co., Ltd.
- Aluminum casting alloy with high strength, high elongation and high thermal conductivity and method for manufacturing same4 Jun 2026US 2026/0152828 A1Korea Institute of Materials Science
- Method For Reducing Or Eliminating Additive Components Or/And Impurities In Aluminum Alloys28 May 2026US 2026/0146352 A1National University Corporation University of Toyama
- Process for Removing Salts from an Aluminium Dross14 May 2026US 2026/0132038 A1FinexTech (Pty) Ltd
Most cited
By later US patents
- Method and apparatus for circulating a molten media152US 3,984,234 AAluminum Company of America · 1976
- Treatment of molten light metals and apparatus146US 4,931,091 AAlcan International Limited · 1990
- Gas injection method139US 4,052,199 AThe Carborundum Company · 1977
- Gas injection apparatus139US 4,169,584 AThe Carborundum Company · 1979
- Rotary blade-type apparatus for dissolving alloy elements and dispersing gas in an aluminum bath133US 4,802,656 AAluminium Pechiney · 1989