Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5075098 | Method of preparing Na.sub.2 S (II) | Friedrich Bittner, Walter Hinrichs, Ludwig Lange, Erich Splett | 1991-12-24 |
| 5039505 | Method of preparing Na.sub.2 S (III) | Friedrich Bittner, Walter Hinrichs, Ludwig Lange, Erich Splett | 1991-08-13 |
| 5039506 | Method of preparing NA2S (I) | Friedrich Bittner, Walter Hinrichs, Ludwig Lange, Erich Splett | 1991-08-13 |