C09B 41/009
Diazotising and coupling in one step
Official title: {Diazotising and coupling in one step}
C09B41/009 (Diazotising and coupling in one step) appears on 13 US grants and 1 published applications in this corpus.
Search patents in C09B- Granted patents
- 13
- Published applications
- 1
- Assignees
- 5
- Inventors
- 19
- Latest grant
- 11 Jul 2006
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 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 | 1 |
| 2006 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Organic solvent-free process for the preparation of 2-(2-nitrophenylazo)phenols11 Jul 2006US 7,074,906 B2Ciba Specialty Chemicals Corporation
- Process for the preparation of dyestuffs26 Nov 1996US 5,578,711 ABayer Aktiengesellschaft
- Process for the preparation of dyestuffs30 Jul 1996US 5,541,299 ABayer Aktiengesellschaft
- Process for the preparation of dyestuffs26 Mar 1996US 5,502,171 ABayer Aktiengesellschaft
- Process for the manufacture of formulations of water-insoluble azo dyes25 Dec 1990US 4,980,459 ACiba-Geigy Corporation
Most cited
By later US patents
- Neutron and/or gamma radiation detecting system31US 4,829,185 AKernforschungszentrum Karlsruhe GmbH · 1989
- Process for the preparation of water-soluble azo dyestuffs by reacting an aromatic amine and a coupling component with alkali metal nitrite or alkyl nitrite in the absence of acid13US 4,035,350 AHoechst Aktiengesellschaft · 1977
- Preparing concentrated azo dye solutions using nitrite salt as both coupling component and diazotizing agent6US 4,432,899 ABayer Aktiengesellschaft · 1984
- Process for the preparation of solutions of cationic polyazo dyestuffs5US 4,400,321 ABayer Aktiengesellschaft · 1983
- Process for the manufacture of formulations of water-insoluble azo dyes4US 4,980,459 ACiba-Geigy Corporation · 1990