C01F 7/0686
From sulfate-containing minerals
Official title: from sulfate-containing minerals, e.g. alunite
C01F7/0686 (From sulfate-containing minerals) appears on 15 US grants and 1 published applications in this corpus.
Search patents in C01F- Granted patents
- 15
- Published applications
- 1
- Assignees
- 5
- Inventors
- 33
- Latest grant
- 22 Oct 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 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 | 0 | 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 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Recovery process22 Oct 2019US 10,450,630 B2LI-Technology Pty Ltd.
- Recovery of alumina values from alunite ore21 Oct 1986US 4,618,480 AResource Technology Associates
- Process for recovering aluminum from alunite28 Oct 1980US 4,230,678 AEarth Sciences, Inc.
- Process for alunite treatment26 Sep 1978US 4,117,077 A
- Process for reduction of alunite ore in aluminum recovery process6 Jun 1978US 4,093,700 AEarth Sciences, Inc.
Most cited
By later US patents
- Recovery process14US 10,450,630 B2LI-Technology Pty Ltd. · 2019
- Method of producing alumina and potassium sulphate from alunite11US 3,984,521 A1976
- Method of producing alumina and potassium sulphate form alunite10US 3,983,211 A1976
- Process for recovering aluminum from alunite5US 3,996,334 AEarth Sciences, Inc. · 1976
- Production of monobasic potassium phosphate by electrodialysis5US 4,033,842 AEarth Sciences, Inc. · 1977