C01B 21/1472
Separation
Official title: {Separation}
C01B21/1472 (Separation) appears on 13 US grants and 5 published applications in this corpus.
Search patents in C01B- Granted patents
- 13
- Published applications
- 5
- Assignees
- 8
- Inventors
- 33
- Latest grant
- 22 Apr 2014
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 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for removing hydrazine from hydroxlyamine solutions22 Apr 2014US 8,703,088 B2Cytec Technology Corp.
- Process for producing hydroxylamine17 Feb 2009US 7,491,846 B2Showa Denko K. K.
- Process for the preparation of hydroxylammonium15 Aug 2006US 7,090,817 B2Dsm IP Assets B.V.
- Process for the separation of a hydroxylammonium salt solution2 Mar 2004US 6,699,452 B2Dsm N. V.
- Process for separating medium boiling substances from a mixture of low, medium and high boiling substances3 Jul 2001US 6,254,735 B1BASF SE
- Process for removing hydrazine from hydroxlyamine solutions28 Nov 2013US 2013/0315812 A1Cytec Technology Corp.
- Processes for removing hydrazine from hydroxylamine solutions21 Jun 2012US 2012/0152852 A1Cytec Technology Corp.
- Process for Producing Hydroxylamine14 Aug 2008US 2008/0193362 A1Showa Denko K. K.
- Process for the preparation of hydroxylammonium3 Mar 2005US 2005/0047987 A1Dsm IP Assets B.V.
- Process for the separation of a hydroxylammonium salt solution3 Apr 2003US 2003/0064016 A1Dsm N. V.
Most cited
By later US patents
- Process for production of aqueous solutions of free hydroxylamine19US 5,837,107 ABASF SE · 1998
- Process for separating medium boiling substances from a mixture of low, medium and high boiling substances15US 6,254,735 B1BASF SE · 2001
- Process for reducing the acid content of hydroxylamine salt solutions and for preparing hydroxylamines from hydroxylamine salts13US 5,281,311 ASachem, Inc. · 1994
- Process for producing hydroxylamine8US 7,491,846 B2Showa Denko K. K. · 2009
- Hydroxylamine purification via liquid/liquid extraction7US 4,166,842 AAllied Chemical Corporation · 1979