Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857665 | Process for working up the filtration residue of crude sodium prepared by fusion electrolysis into a high-purity sodium alcholate | Walter Hinrichs, Herbert Hovestadt, Ludwig Lange, Erich Splett | 1989-08-15 |