C01G 28/001
Preparation involving a solvent-solvent extraction, an adsorption or an ion-exchange
Official title: {Preparation involving a solvent-solvent extraction, an adsorption or an ion-exchange}
C01G28/001 (Preparation involving a solvent-solvent extraction, an adsorption or an ion-exchange) appears on 23 US grants and 1 published applications in this corpus.
Search patents in C01G- Granted patents
- 23
- Published applications
- 1
- Assignees
- 19
- Inventors
- 58
- Latest grant
- 27 May 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 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 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for the removal of impurity elements from solutions of valuable metals27 May 1997US 5,632,963 AHenkel Kommanditgesellschaft auf Aktien
- Process for the removal of toxic cyanide and heavy metal species from alkaline solutions4 Jun 1996US 5,522,997 ACognis Corporation
- Supported sorbents for removal and recovery of arsenic from gases19 Jul 1994US 5,330,560 AGas Research Institute
- Process for selective extraction of contaminant elements from mixtures of electrolytes in solution13 Aug 1991US 5,039,496 AHenkel Kommanditgesellschaft auf Aktien
- Composition for extraction of metal ions and oxanions12 Feb 1991US 4,992,207 ABio-Recovery Systems, Inc.
Most cited
By later US patents
- Removal of heavy metals from waste water61US 4,731,187 AMiyoshi Yushi Kabushiki Kaisha · 1988
- Process for the removal of impurity elements from solutions of valuable metals36US 5,632,963 AHenkel Kommanditgesellschaft auf Aktien · 1997
- Supported sorbents for removal and recovery of arsenic from gases17US 5,330,560 AGas Research Institute · 1994
- Treatment of ores or metallurgical by-products containing arsenic and antimony16US 4,102,976 AMetallurgie Hoboken-Overpelt · 1978
- Composition for extraction of metal ions and oxanions15US 4,992,207 ABio-Recovery Systems, Inc. · 1991