Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5246484 | Process for reducing nonferrous metal oxides in slags | — | 1993-09-21 |
| 5171550 | Process for removing thallium from lead bullion | Jiadong Hang, Juergen Heering, Reinhard Hoehn, Joachim Krueger | 1992-12-15 |