Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5919914 | Clathrate of bis 6-hydroxy-4-methyl-5-(3-methyl-imidazolium-1-yl) -3-(phen-4-ylazo) pyridin-2-one! ethylene and an aromatic compound | Manfred Ruske, Peter Erk | 1999-07-06 |
| 5496378 | Imidazolymethylated copper phthalocyanine dyes | Manfred Ruske, Udo Mayer | 1996-03-05 |
| 5286854 | Basic azo dyes with a coupling component of the hydroxynaphthalenecarboxylic acid series | Erwin Hahn, Udo Mayer | 1994-02-15 |