C01B 17/903
By liquid-liquid extraction
Official title: {by liquid-liquid extraction}
C01B17/903 (By liquid-liquid extraction) appears on 15 US grants and 3 published applications in this corpus.
Search patents in C01B- Granted patents
- 15
- Published applications
- 3
- Assignees
- 12
- Inventors
- 25
- Latest grant
- 29 Mar 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods for the manufacture of cellulose nanocrystals29 Mar 2016US 9,297,111 B1Domtar Paper Company, LLC
- Method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material8 Nov 2011US 8,052,953 B2
- Method for reclaiming metal sulfate-containing waste sulfuric acid8 Jan 2002US 6,337,061 B1
- Extraction of acids and metal salts from aqueous solutions with diethyl dodecylphosphonate28 Oct 1997US 5,682,593 ABayer Aktiengesellschaft
- Process for recovering sulfuric acid from metallic sulfate-containing exhaust sulfuric acid6 Feb 1996US 5,489,423 ANittetsu Mining Co., Ltd.
- Method for the separation of a non-volatile strong acid from a salt thereof and compositions produced thereby29 Nov 2012US 2012/0301389 A1Asher Vitner Ltd.
- Method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material11 Nov 2010US 2010/0284900 A1
- Process for removing organic impurities from sulfuric acid with liquid or supercritical carbon dioxide1 Jul 2004US 2004/0126311 A1
Most cited
By later US patents
- Method for treating zinc-containing sulfate solution32US 5,084,180 ACominco Ltd. · 1992
- Method for reclaiming metal sulfate-containing waste sulfuric acid17US 6,337,061 B12002
- Process for the recovery of sulfuric acid16US 4,440,734 AGouvernement du Quebec · 1984
- Process for recovery of waste H.sub.2 SO.sub.4 and HCl15US 4,113,588 ASolex Research Corporation of Japan · 1978
- Method for recovering sulfuric acid from concentrated acid hydrolysate of plant cellulose material14US 8,052,953 B22011