Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8921564 | Basic bisazo compounds | Ludwig Hasemann, Friedrich Lehr, Heidrun Schene | 2014-12-30 |
| 8894815 | Storage stable solutions of optical brighteners | John Martin Farrar, Andrew Clive Jackson, Margaret Mahon | 2014-11-25 |
| 7371831 | Azo dyestuffs | Jurgen Geiwiz | 2008-05-13 |
| 6319290 | Fiber-reactive disazo dyestuffs | Detlef Kalweit | 2001-11-20 |