Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10392514 | Storage-stable dye solutions | — | 2019-08-27 |
| 8921564 | Basic bisazo compounds | Ludwig Hasemann, Martin Oberholzer, Heidrun Schene | 2014-12-30 |
| 7597721 | Concentrated aqueous compositions of dyestuffs | — | 2009-10-06 |
| 7183409 | Basic mono- and bisazo compounds | Reinhard Pedrazzi, Heidrun Schene | 2007-02-27 |
| 6844428 | Use of disazo compounds | Ludwig Hasemann | 2005-01-18 |
| 6365719 | Bridged disazo compounds | — | 2002-04-02 |
| 5747657 | Reactive monoazo dyestuffs and the processes in which they are produced | — | 1998-05-05 |
| 5334710 | Compounds having non-linear optical properties | Markus Ahlheim | 1994-08-02 |
| 5006644 | "Copper complexes of further substituted 2,4-di-[2'-(2""-hydroxyphenylazo)-1'-hydroxy-3'-sulfonaphthyl-6'-amino]-6 -chloro-1,3,5-triazines" | — | 1991-04-09 |
| 4820808 | Copper Complexes of disazo compounds having two substituted 2-hydroxyphenyl diazo component radicals and two 3-methylpyrazol-5-one coupling component radicals | Kurt Brenneisen | 1989-04-11 |
| 4670547 | Tetrakisazo compounds having two 1-hydroxy-3- or 4-sulfo-6- or 7-amino- or substituted amino-naphthalene coupling component radicals the amino or substituted amino groups of which are linked 1,3,5-triazine rings | — | 1987-06-02 |