Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5606034 | Process for the preparation of azo dyes | Karl Friedrich Haarburger, Herbert Mauser | 1997-02-25 |
| 5196518 | Process for the preparation of metallizable azo dyes by carrying out the coupling in the presence of a buffer mixture | Claudio Puebla, Gunter Sereinig | 1993-03-23 |
| 5153140 | Process for controlling and optimising industrial processes for the preparation of dyes, fluorescent whitening agents and their intermediates | Roland Minges, Claudio Puebla, Wilhelm Schmidt | 1992-10-06 |
| 5116955 | Process for the preparation of mono- and polyazo dyes | Roland Minges | 1992-05-26 |
| 5026830 | Process for the preparation of azo dyes by carrying out coupling in the presence of an alkali metal chloride and ammonium chloride | Claudio Puebla, Gunter Sereinig | 1991-06-25 |
| 4996302 | Process for the preparation of polyazo dyes | — | 1991-02-26 |
| 4988804 | Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like | — | 1991-01-29 |