C22B 21/066
Treatment of circulating aluminium
Official title: {Treatment of circulating aluminium, e.g. by filtration (C22B21/068 takes precedence)}
C22B21/066 (Treatment of circulating aluminium) appears on 171 US grants and 70 published applications in this corpus.
Search patents in C22B- Granted patents
- 171
- Published applications
- 70
- Assignees
- 96
- Inventors
- 292
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 15 | 0 |
| 1980 | 3 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 3 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 6 | 4 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 0 | 5 |
| 2009 | 2 | 3 |
| 2010 | 4 | 5 |
| 2011 | 2 | 7 |
| 2012 | 4 | 3 |
| 2013 | 5 | 1 |
| 2014 | 2 | 2 |
| 2015 | 0 | 2 |
| 2016 | 2 | 2 |
| 2017 | 1 | 3 |
| 2018 | 2 | 2 |
| 2019 | 4 | 2 |
| 2020 | 1 | 2 |
| 2021 | 2 | 3 |
| 2022 | 1 | 2 |
| 2023 | 3 | 3 |
| 2024 | 2 | 5 |
| 2025 | 3 | 3 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of recycling aluminum alloys and purification thereof24 Jun 2025US 12,338,507 B2Alcoa USA Corp.
- Metal melting apparatus, screen plate for metal melting, and method of melting metal20 May 2025US 12,305,919 B2Tounetsu Co., Ltd.
- Molten metal filter device for casting vehicle components22 Apr 2025US 12,280,421 B2GM Global Technology Operations LLC
- Apparatus and methods for filtering metals21 May 2024US 11,986,881 B2Alcoa Canada Co.
- Method for regenerating copper-containing aluminum alloy from aluminum alloy scrap26 Mar 2024US 11,939,644 B2The Boeing Company
- Production method for baseball bats based on 6-series recycled aluminum25 Jun 2026US 2026/0176715 A1Zhongshan Arthur Melody Co., Ltd.
- Acoustic rotary liquid processor29 Jan 2026US 2026/0028694 A1
- Methods of recycling aluminum alloys and purification thereof11 Sep 2025US 2025/0283192 A1Alcoa USA Corp.
- Metal melting apparatus, screen plate for metal melting, and method of melting metal20 Feb 2025US 2025/0060162 A1Tounetsu Co., Ltd.
- Method of recycling aluminum scrap and apparatus for recycling aluminum scrap13 Feb 2025US 2025/0051876 A1Honda Motor Co., 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
- Metal treatment system131US 4,392,888 AAluminum Company of America · 1983