C01B 21/1481
Purification
Official title: {Purification}
C01B21/1481 (Purification) appears on 19 US grants and 9 published applications in this corpus.
Search patents in C01B- Granted patents
- 19
- Published applications
- 9
- Assignees
- 13
- Inventors
- 44
- Latest grant
- 22 Apr 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 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 manufacturing highly concentrated hydroxylamine6 Feb 2007US 7,172,744 B2BASF SE
- 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 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.
- Method for removing organic contaminants5 Nov 2009US 2009/0272700 A1
- Process for Producing Hydroxylamine14 Aug 2008US 2008/0193362 A1Showa Denko K. K.
- Method and device for stripping organic contaminants1 Nov 2007US 2007/0253885 A1China Petrochemical Development Corporation
Most cited
By later US patents
- Ultrapure hydroxylamine compound solutions and process of making same8US 6,235,162 B1Sachem, Inc. · 2001
- Process for producing hydroxylamine8US 7,491,846 B2Showa Denko K. K. · 2009
- Purification of hydroxylamine6US 5,788,946 AAshland Inc. · 1998
- Purification of hydroxylamine6US 5,872,295 AConcept Sciences, Inc. · 1999
- Method for preparing highly stabilized hydroxylamine solutions6US 6,534,681 B1BASF SE · 2003