Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4748009 | Method of recovering vanadium from vanadium-containing materials with at least 6 wt % oxidic vanadium compounds | Reinhard Hahn, Rudolf Fichte, Hans-Joachim Retelsdorf | 1988-05-31 |
| 4737187 | Method of treating nickel-containing and vanadium-containing residues | Reinhard Hahn, Hans Karl Hess | 1988-04-12 |
| 4662936 | Method of treating nickel-containing and vanadium-containing residues | Reinhard Hahn, Hans Karl Hess | 1987-05-05 |
| 4645651 | Method of producing vanadium compounds from vanadium-containing residues | Reinhard Hahn, Hans Karl Hess | 1987-02-24 |
| 4623386 | Carbothermal method of producing cobalt-boron and/or nickel-boron | Reinhard Hahn, Hans-Joachim Retelsdorf, Rudolf Fichte | 1986-11-18 |