C09B 43/44
Preparation of azo dyes from other azo compounds: by substituting amine groups
Official title: by substituting amine groups for hydroxyl groups or hydroxyl groups for amine groups; Desacylation of amino-acyl groups; Deaminating
C09B43/44 (Preparation of azo dyes from other azo compounds: by substituting amine groups) appears on 9 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 9
- Published applications
- 2
- Assignees
- 7
- Inventors
- 22
- Latest grant
- 31 Mar 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 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 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Disulfide dyes31 Mar 2015US 8,992,633 B2BASF SE
- Azoxy dyes and copper complexes thereof7 Jun 2005US 6,903,197 B2BASF SE
- Azoxy dyes and their Cu complexes27 Apr 2004US 6,727,351 B1BASF SE
- Bisazo ink-jet dyes30 Mar 1999US 5,888,286 AZeneca Limited
- Process for the preparation of reactive azo dyes16 Feb 1999US 5,872,228 ABayer Aktiengesellschaft
Most cited
By later US patents
- Bisazo ink-jet dyes12US 5,888,286 AZeneca Limited · 1999
- Azoxy dyes and copper complexes thereof6US 6,903,197 B2BASF SE · 2005
- Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds4US 4,810,783 ABayer Aktiengesellschaft · 1989
- Hair dye composition containing a 4'-amino-2-halogen-4-{bis-(-hydroxyethyl)amino} azobenzene compound4US 5,409,502 AWella Aktiengesellschaft · 1995
- Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic acids2US 4,841,027 ASumitomo Chemical Company, Limited · 1989