C01B 21/1445
Of hydoxylamine from its salts
Official title: {of hydoxylamine from its salts}
C01B21/1445 (Of hydoxylamine from its salts) appears on 27 US grants and 9 published applications in this corpus.
Search patents in C01B- Granted patents
- 27
- Published applications
- 9
- Assignees
- 12
- Inventors
- 59
- Latest grant
- 17 Feb 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 4 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for producing hydroxylamine17 Feb 2009US 7,491,846 B2Showa Denko K. K.
- Method for producing an aqueous solution hydroxylamine16 Sep 2008US 7,425,247 B2Domo Caproleuna GmbH
- Preparation of a high purity and high concentration hydroxylamine free base8 Jul 2008US 7,396,519 B2San Fu Chemical Co., Ltd.
- Process for manufacturing highly concentrated hydroxylamine6 Feb 2007US 7,172,744 B2BASF SE
- Method for producing an aqueous hydroxylamine solution devoid of salt12 Sep 2006US 7,105,078 B2BASF SE
- Amidoxime compounds as chelating agents in semiconductor processes30 Apr 2009US 2009/0107520 A1
- Stabilization of hydroxylamine containing solutions and method for their preparation30 Apr 2009US 2009/0112024 A1
- Process for Producing Hydroxylamine14 Aug 2008US 2008/0193362 A1Showa Denko K. K.
- Method for the productiong of an aqueous hydroxylamine solution16 Feb 2006US 2006/0032734 A1Domo Caproleuna GmbH
- Preparation of a high purity and high concentration hydroxylamine free base28 Jul 2005US 2005/0163694 A1San Fu Chemical Co., Ltd.
Most cited
By later US patents
- Electrochemical conversion of nitrogen containing gas to hydroxylamine and hydroxylammonium salts19US 5,709,789 ASachem, Inc. · 1998
- Process for production of aqueous solutions of free hydroxylamine19US 5,837,107 ABASF SE · 1998
- Preparation of aqueous solutions of free hydroxylamine18US 4,778,669 ABASF SE · 1988
- Hydroxylamine purification via ion exclusion17US 4,147,623 AAllied Chemical Corporation · 1979
- Preparation from hydroxylammonium sulfate of oximes and hydroxamic acids via alcoholic hydroxylamine solution17US 4,507,248 AAllied Corporation · 1985