Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5380871 | Preparation of halogenated indigo | Reinhold Kohlhaupt, Udo Bergmann | 1995-01-10 |
| 5109137 | Purification of indigo | Reinhold Kohlhaupt, Manfred Gaeng, Guenter Engelhardt, Walter Bieg, Matthias Fankhaenel | 1992-04-28 |
| 5075458 | Purification of indigo | Reinhold Kohlhaupt, Manfred Gaeng, Guenter Engelhardt, Walter Bieg, Matthias Fankhaenel | 1991-12-24 |