D06P 3/3075
Preparing azo dyes on the material
Official title: {preparing azo dyes on the material}
D06P3/3075 (Preparing azo dyes on the material) appears on 3 US grants and 0 published applications in this corpus.
Search patents in D06P- Granted patents
- 3
- Published applications
- 0
- Assignees
- 2
- Inventors
- 7
- Latest grant
- 10 Sep 1991
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 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 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dye composition for keratinous fibers containing a 2-substituted 4-aminophenol compound as a developer, and a coupling substance10 Sep 1991US 5,047,066 AKao Corporation
- Process for dyeing human hair with diazo salts and coupling components25 Sep 1979US 4,168,952 AHenkel Kommanditgesellschaft auf Aktien
- Process for dyeing human hair with diazo salts and coupling components28 Aug 1979US 4,165,967 AHenkel Kommanditgesellschaft auf Aktien
No published applications in this class yet.
Most cited
By later US patents
- Dye composition for keratinous fibers containing a 2-substituted 4-aminophenol compound as a developer, and a coupling substance7US 5,047,066 AKao Corporation · 1991
- Process for dyeing human hair with diazo salts and coupling components4US 4,165,967 AHenkel Kommanditgesellschaft auf Aktien · 1979
- Process for dyeing human hair with diazo salts and coupling components3US 4,168,952 AHenkel Kommanditgesellschaft auf Aktien · 1979