C01F 7/20
Preparation of aluminium oxide or hydroxide from aluminous ores using acids or
Official title: Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
C01F7/20 (Preparation of aluminium oxide or hydroxide from aluminous ores using acids or) appears on 90 US grants and 61 published applications in this corpus.
Search patents in C01F- Granted patents
- 90
- Published applications
- 61
- Assignees
- 79
- Inventors
- 224
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 5 |
| 2015 | 3 | 6 |
| 2016 | 5 | 8 |
| 2017 | 2 | 2 |
| 2018 | 5 | 3 |
| 2019 | 4 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 4 |
| 2024 | 4 | 3 |
| 2025 | 3 | 3 |
| 2026 | 3 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ore hydrometallurgical slag and phosphating slag7 Apr 2026US 12,595,532 B2Gem Co., Ltd.
- Process for producing high purity aluminum materials31 Mar 2026US 12,590,008 B2HiurA Pty Ltd
- Process for producing alumina and a lithium salt17 Mar 2026US 12,577,115 B2Tianqi Lithium Kwinana Pty Ltd
- Process and system for lithium production25 Nov 2025US 12,479,738 B2Icsip Pty Ltd
- Production of lithium chemicals and metallic lithium16 Sep 2025US 12,415,733 B2Icsip 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
- Process and system for lithium production12 Mar 2026US 2026/0070800 A1Icsip Pty Ltd
- Process and system for lithium production22 Jan 2026US 2026/0022023 A1Icsip Pty Ltd
- Process and system for lithium production15 Jan 2026US 2026/0015247 A1Icsip Pty Ltd
Most cited
By later US patents
- Method for the recovery of minerals and production of by-products from coal ash109US 4,652,433 AFlorida Progress Corporation · 1987
- Recovery of alumina from siliceous minerals39US 4,158,042 AAlcan Research and Development Limited · 1979
- Process for the extraction of alumina from aluminum-containing silicates31US 4,110,399 AInstitutt for Atomenergi · 1978
- Process for the extraction of aluminum from aluminum ores27US 4,069,296 A1978
- Process for the preparation of pure aluminum oxide25US 4,224,287 AVEB Mansfeld Kombinat Wilhelm Pieck · 1980