C09B 62/012
Metal complex azo dyes
C09B62/012 (Metal complex azo dyes) appears on 15 US grants and 0 published applications in this corpus.
Search patents in C09B- Granted patents
- 15
- Published applications
- 0
- Assignees
- 5
- Inventors
- 14
- Latest grant
- 5 Feb 1991
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Fibre-reaction 1:1 chromium complex azo or azomethine dyes having a bidentate chelating group and a monofunctional neutral ligand5 Feb 1991US 4,990,598 A
- Process for dyeing or printing textile fibre materials in stable black shades using metal complex reactive dyes with a red shift and a yellow or green shift9 May 1989US 4,828,572 ACiba-Geigy Corporation
- Copper Complexes of disazo compounds having two substituted 2-hydroxyphenyl diazo component radicals and two 3-methylpyrazol-5-one coupling component radicals11 Apr 1989US 4,820,808 ASandoz Ltd.
- Fiber-reactive chromium complexes and their preparation and use for polyamide, leather and cotton21 Mar 1989US 4,813,972 ACiba-Geigy Corporation
- Heavy metal-containing monoazo dyes11 Oct 1988US 4,777,247 ABayer Aktiengesellschaft
No published applications in this class yet.
Most cited
By later US patents
- Reactive complex chromium-bearing azo dyestuffs10US 4,218,367 AProduits Chimiques Ugine Kuhlmann · 1980
- Azo compounds5US 3,933,785 ACiba-Geigy Corporation · 1976
- Metal complex dyestuffs useful as solvent, direct, pigment or fiber-reactive dyes5US 4,772,687 ABayer Aktiengesellschaft · 1988
- 4-Methyl-2,6-dihydroxy-3-cyanopyridine containing dyestuffs4US 3,956,263 ACiba-Geigy Corporation · 1976
- Heavy metal complexes of azo dyestuffs containing a heterocyclic diazo component and the residue of 5-halogeno-2,3-dihydrozypyridine as coupling component4US 4,001,203 ACiba-Geigy Corporation · 1977