Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5270455 | Polyazo dyes containing resorcinol as middle component and metal complexes thereof | — | 1993-12-14 |
| 5003051 | Process for the preparation of metallizable monoazo dyes in the presence of ketones | Peter Loew, Alois Puntener | 1991-03-26 |
| 5001227 | Fibre-reactive 1:1 chromium complex azo or azomethine dyes having a bidentate chelating group and a monofunctional neutral ligand | Hans U. Schutz, Gerhard Back | 1991-03-19 |
| 4990598 | Fibre-reaction 1:1 chromium complex azo or azomethine dyes having a bidentate chelating group and a monofunctional neutral ligand | Hans U. Schutz, Gerhard Back | 1991-02-05 |
| 4874849 | Asymmetric 1:2-chromium complex dyes containing two azo dyes, one containing an acetoacetanilide coupling component | Gerhard Back, Fabic Beffa, Alois Puntener | 1989-10-17 |
| 4813972 | Fiber-reactive chromium complexes and their preparation and use for polyamide, leather and cotton | Hans U. Schutz, Gerhard Back | 1989-03-21 |
| 4742162 | Azo-stibene condensates as leather dyes | — | 1988-05-03 |
| 4723001 | Fibre-reactive chromium complexes and their preparation and use | Hans U. Schutz, Gerhard Back | 1988-02-02 |
| 4678851 | Metal dye complexes containing an azo or azomethine dye and a colorless ligand with the C.dbd.N--N.dbd.C group | Gerhard Back, Hans U. Schutz | 1987-07-07 |
| 4661587 | Bis 1:2 chromium complexes of disazo and azo or azomethine dyes | Fabio Beffa | 1987-04-28 |
| 4652631 | Bis 1:2 chromium complexes of disazo and azo or azomethine dyes | Fabio Beffa | 1987-03-24 |