C09B 43/003
Cyclisation of azo dyes
Official title: {Cyclisation of azo dyes; Condensation of azo dyes with formation of ring, e.g. of azopyrazolone dyes}
C09B43/003 (Cyclisation of azo dyes) appears on 12 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 12
- Published applications
- 2
- Assignees
- 7
- Inventors
- 25
- Latest grant
- 17 Jul 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Dichroic pigment compounds and compositions containing the same17 Jul 2018US 10,023,743 B2Sumitomo Chemical Company, Limited
- Dyes and dye-donor elements for thermal dye transfer recording31 Dec 1996US 5,589,316 AAgfa-Gevaert
- Certain 3-phenylhydrazono-2-amino-1,1,3-propene tricarbonitrile30 Aug 1983US 4,401,600 ACiba-Geigy Corporation
- Process for the dyeing and printing of hydrophobic synthetic organic fiber materials with water-insoluble azo dyestuffs6 Oct 1981US 4,293,306 AHoechst Aktiengesellschaft
- Cumarinic pigments24 Feb 1981US 4,252,566 AMontedison S.p.A.
Most cited
By later US patents
- Polycyclic compounds50US 4,084,053 ACiba-Geigy Corporation · 1978
- Dye diffusion transfer process employing compounds that release sulfonamide dye providing radicals9US 4,198,235 AAgfa-Gevaert · 1980
- Dyes and dye-donor elements for thermal dye transfer recording4US 5,589,316 AAgfa-Gevaert · 1996
- Certain 3-phenylhydrazono-2-amino-1,1,3-propene tricarbonitrile3US 4,401,600 ACiba-Geigy Corporation · 1983
- Process for the preparation of azo dyes2US 4,243,583 ACiba-Geigy Corporation · 1981