Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |