C01B 17/907
Removal of arsenic
Official title: {Removal of arsenic}
C01B17/907 (Removal of arsenic) appears on 5 US grants and 2 published applications in this corpus.
Search patents in C01B- Granted patents
- 5
- Published applications
- 2
- Assignees
- 5
- Inventors
- 18
- Latest grant
- 31 Jan 2017
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 | 0 | 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 | 1 | 0 |
| 1995 | 1 | 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 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for separating arsenic and heavy metals in an acidic washing solution31 Jan 2017US 9,555,362 B2Eisenmann SE
- Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids12 Sep 1995US 5,449,503 AAlliedSignal Inc.
- Fluoride removal from sulphuric acid28 Jun 1994US 5,324,499 AChemetics International Company Ltd.
- Removal of arsenic from acids8 Sep 1987US 4,692,228 ATenneco Canada Inc. (ERCO division)
- 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
- Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids8US 5,449,503 AAlliedSignal Inc. · 1995
- Fluoride removal from sulphuric acid6US 5,324,499 AChemetics International Company Ltd. · 1994
- Removal of arsenic from acids5US 4,692,228 ATenneco Canada Inc. (ERCO division) · 1987