Issued Patents All Time
Showing 1–5 of 5 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 |
| 5710260 | Method of extracting sennosides A, B and A1 | Wolf Grimminger, Pentti Hietala, Helga Zaeske, Klaus Witthohn | 1998-01-20 |
| 5393898 | Method of preparing diacetyl rhein | Wolf Grimminger, Pentti Hietala, Helga Zaeske, Klaus Witthohn | 1995-02-28 |
| 5391775 | Process for production of diacetylrhein | Wolf Grimminger, Pentti Hêitala, Klaus Witthohn, Helga Zaeske | 1995-02-21 |