C01F 7/22
With halides or halogen acids
Official title: with halides or halogen acids
C01F7/22 (With halides or halogen acids) appears on 39 US grants and 27 published applications in this corpus.
Search patents in C01F- Granted patents
- 39
- Published applications
- 27
- Assignees
- 28
- Inventors
- 95
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 4 |
| 2015 | 2 | 6 |
| 2016 | 5 | 6 |
| 2017 | 2 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 3 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for producing alumina and a lithium salt17 Mar 2026US 12,577,115 B2Tianqi Lithium Kwinana Pty Ltd
- Process for recovering titanium dioxide17 Jun 2025US 12,331,380 B2Commonwealth Scientific and Industrial Research Organisation
- Cementitious material production from non-limestone material23 Apr 2024US 11,964,922 B2Brimstone Energy Inc.
- Method of recovering rare earth aluminum and silicon from rare earth-containing aluminum-silicon scraps7 May 2019US 10,280,482 B2Grirem Advanced Materials Co., Ltd.
- Processes for preparing alumina and various other products8 Jan 2019US 10,174,402 B2Orbite Technologies Inc.
- A method for the preparation of alumina13 Aug 2026US 2026/0234017 A1Playa One Pty Ltd
- Cementitious material production from non-limestone material14 Nov 2024US 2024/0375997 A1Brimstone Energy Inc.
- Process for recovering titanium dioxide13 Jul 2023US 2023/0220516 A1Commonwealth Scientific and Industrial Research Organisation
- A process for producing alumina and a lithium salt9 Feb 2023US 2023/0040892 A1Tianqi Lithium Kwinana Pty Ltd
- Cementitious material production from non-limestone material2 Feb 2023US 2023/0036470 A1Brimstone Energy Inc.
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 preparation of pure aluminum oxide25US 4,224,287 AVEB Mansfeld Kombinat Wilhelm Pieck · 1980
- Removal of impurites from clay25US 4,239,735 AThe United States of America as represented by the Secretary of the Interior · 1980
- Process for obtaining pure alumina by the hydrochloric attack of aluminous ores and extraction of the impurities by means of a sulphuric treatment23US 4,237,102 AAluminum Pechiney · 1980