Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6624192 | Process for production of diacetylrhein | Wolf Grimminger, Pentti Hêitala, Klaus Witthohn, Helga Zaeske | 2003-09-23 |
| 6596764 | Method of preparing diacetyl rhein | Wolf Grimminger, Pentti Hietala, Helga Zaeske, Klaus Witthohn | 2003-07-22 |