Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874848 | Asymmetrical polyazo chromium complex dyes comprising resorcinol as a coupling component | Fabio Beffa | 1989-10-17 |
| 4874849 | Asymmetric 1:2-chromium complex dyes containing two azo dyes, one containing an acetoacetanilide coupling component | Fabic Beffa, Ulrich Schlesinger, Alois Puntener | 1989-10-17 |
| 4818246 | Process for improving the light-fastness of leather dyeings | Alois Puntener, Josef Koller | 1989-04-04 |
| 4818248 | Process for dyeing natural or synthetic polyamide fibre materials with 1:1 metal complex dyes in presence of alkali metal fluordsilicate or amindnlum silicate | Walter Mosimann | 1989-04-04 |
| 4813972 | Fiber-reactive chromium complexes and their preparation and use for polyamide, leather and cotton | Hans U. Schutz, Ulrich Schlesinger | 1989-03-21 |