Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4668238 | The dyeing of leather with mixtures of trisazo and tetrakisazo compounds having 1-amino-8-hydroxynaphthalene-mono- or di-sulfonic acid biscoupling component radicals | — | 1987-05-26 |
| 4649194 | 1:2 metal complexes of a disazo compound having a 5-hydroxy-1-(aminophenyl)pyrazole coupling/diazo component radical and disazo compound having a 1-amino-8-hydroxynaphthalene coupling/diazo component | — | 1987-03-10 |
| 4468348 | Trisazo dyes having a 4-(1-amino-3,6-disulfo-8-hydroxy-7-phenylazonaphthyl-2-azo)phenylazo group linked to a coupling component radical | — | 1984-08-28 |
| 4409142 | Disazo compounds having a 5-amino or hydroxy-3-carboxy or methyl-1-substituted phenylphyrazole coupling component radical | — | 1983-10-11 |
| 4390470 | Tetrakisazo dyes containing a stilbenylene or 2,2'-disulfostilbenylene radical | Claude Vogel | 1983-06-28 |
| 4374064 | Metal complexes of disazo compounds having a 5-amino or hydroxy-3-carboxy or methyl-1- substituted phenylpyrazole coupling component radical | — | 1983-02-15 |
| 4358287 | Asymmetric 1:2 metal complexes of diazo compounds | Claude Vogel | 1982-11-09 |
| 4263229 | Metal complex dyes of trisazo compounds having a 3,5-dinitro-2-hydroxyphenylazo group and two other arylazo groups bound to a 1-amino-3-hydroxy-1,3-diamino- or 1,3-dihydroxy-benzene nucleus | Martin Studer | 1981-04-21 |
| 4212802 | 1:2 Chromium complexes of disazo compounds | Claude Vogel | 1980-07-15 |