Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7220843 | Methanesulfonamide azo dyes | Hans Joachim Metz | 2007-05-22 |
| 7132516 | Mono-or bisazo copper complex dyestuffs | — | 2006-11-07 |
| 6506221 | Process for preparing purified dyestuffs | Hans-Tobias Macholdt | 2003-01-14 |
| 6132894 | 1:2 Iron azo-dyestuff complexes | Bansi Lal Kaul | 2000-10-17 |
| 6024771 | Mixtures of 2:1 aluminium complexes | Bansi Lal Kaul | 2000-02-15 |
| 5731422 | 2:1 Aluminum complexes of monoazo compounds | Bansi Lal Kaul | 1998-03-24 |
| 5698683 | Mixed aluminium-heavy metal dyestuff complexes and a process for their preparation | Bansi Lal Kaul | 1997-12-16 |
| 5563260 | Phthalocyanine solvent dyes | Bansi Lal Kaul | 1996-10-08 |