C01B 17/908
Removal of antimony or bismuth
Official title: {Removal of antimony or bismuth}
C01B17/908 (Removal of antimony or bismuth) appears on 4 US grants and 1 published applications in this corpus.
Search patents in C01B- Granted patents
- 4
- Published applications
- 1
- Assignees
- 4
- Inventors
- 14
- Latest grant
- 22 Nov 1994
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 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 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for selectively removing antimony and bismuth from sulphuric acid solutions22 Nov 1994US 5,366,715 AThe University of British Columbia
- Process for separating antimony from acidic solutions containing same with an organic diluent containing a polyol3 Mar 1992US 5,093,090 ANuova Samim S.p.A.
- Method for purification of sulfuric acid solution17 Dec 1985US 4,559,216 AUnitika Ltd.
- Method for removing As, or As and Sb and/or Bi from sulfuric acid18 Dec 1979US 4,179,495 ASumitomo Metal Mining Co., Ltd.
Most cited
By later US patents
- Method for purification of sulfuric acid solution27US 4,559,216 AUnitika Ltd. · 1985
- Method for selectively removing antimony and bismuth from sulphuric acid solutions8US 5,366,715 AThe University of British Columbia · 1994
- Process for separating antimony from acidic solutions containing same with an organic diluent containing a polyol2US 5,093,090 ANuova Samim S.p.A. · 1992