Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4663132 | Method of processing sodium oxalate formed during the digestion of bauxite | Hans-Werner Schmidt, Walter Koch, Martin Hirsch, Yilmaz Yetmen | 1987-05-05 |
| 4643885 | Method of processing sodium oxalate formed during the digestion of bauxite | Hans-Werner Schmidt, Walter Koch, Martin Hirsch, Yilmaz Yetmen | 1987-02-17 |