C01F 7/26
With sulfuric acids or sulfates
Official title: with sulfuric acids or sulfates
C01F7/26 (With sulfuric acids or sulfates) appears on 30 US grants and 9 published applications in this corpus.
Search patents in C01F- Granted patents
- 30
- Published applications
- 9
- Assignees
- 26
- Inventors
- 71
- Latest grant
- 4 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 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 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for the preparation of high purity alumina4 Jul 2023US 11,691,888 B2Scandium International Mining Corporation
- 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.
- Deriving high value products from waste red mud30 Apr 2019US 10,273,561 B2Peloton Resources Pty Ltd
- Process for neutralizing bauxite dissolution residual substance and process for producing aluminum hydroxide3 Nov 2015US 9,175,367 B2Showa Denko K. K.
- Process for neutralizing bauxite dissolution residual substance and process for producing aluminum hydroxide25 Mar 2014US 8,679,427 B2Showa Denko K. K.
- A method for the preparation of alumina13 Aug 2026US 2026/0234017 A1Playa One Pty Ltd
- Process for the preparation of high purity alumina2 Dec 2021US 2021/0371294 A1Scandium International Mining Corporation
- Method of recovering rare earth aluminum and silicon from rare earth-containing aluminum-silicon scraps20 Dec 2018US 2018/0363098 A1Grirem Advanced Materials Co., Ltd.
- Deriving high value products from waste red mud6 Oct 2016US 2016/0289791 A1Peloton Resources Pty Ltd
- Process for neutralizing bauxite dissolution residual substance and process for producing aluminum hydroxide3 Jul 2014US 2014/0186240 A1Showa Denko K. K.
Most cited
By later US patents
- Process for the extraction of alumina from aluminum-containing silicates31US 4,110,399 AInstitutt for Atomenergi · 1978
- Recovery of aluminum and other metal values from fly ash24US 4,252,777 AThe United States of America as represented by the United States Department of Energy · 1981
- Coproducing alumina, iron oxide, and titanium-dioxide from aluminum ore bodies and feedstocks22US 6,447,738 B1Solv-Ex Corporation · 2002
- Method of obtaining pure alumina by acid attack on aluminous minerals containing other elements21US 4,124,680 AAluminum Pechiney · 1978
- Alumina production20US 3,983,212 A1976