Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5908489 | Process for removing antimony from hydrofluoric acid solutions which contain Ta/Nb | Karlheinz Reichert, Uwe Böhmke | 1999-06-01 |
| 5874056 | Metal tungstates and method of preparing them and their use | Karlheinz Reichert, Udo Sulkowski | 1999-02-23 |
| 5209910 | Process for the recovery and separation of tantalum and niobium | Joachim Eckert | 1993-05-11 |
| 5194232 | Process for the preparation of tantalum/niobium hydroxides and oxides with a low fluoride content | Erk-Rudiger Feuerhahn, Horst Zimmermann | 1993-03-16 |
| 5068097 | Highly pure tantalum pentoxide and a process for its preparation | Joachim Eckert | 1991-11-26 |