Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5080881 | Method of preparing lower sodium polysulfides from higher sodium polysulfides and sodium | Friedrich Bittner, Herbert Hovestadt, Ludwig Lange, Erich Splett | 1992-01-14 |
| 5075098 | Method of preparing Na.sub.2 S (II) | Friedrich Bittner, Lutz Hippe, Ludwig Lange, Erich Splett | 1991-12-24 |
| 5039505 | Method of preparing Na.sub.2 S (III) | Friedrich Bittner, Lutz Hippe, Ludwig Lange, Erich Splett | 1991-08-13 |
| 5039506 | Method of preparing NA2S (I) | Friedrich Bittner, Lutz Hippe, Ludwig Lange, Erich Splett | 1991-08-13 |
| 4857665 | Process for working up the filtration residue of crude sodium prepared by fusion electrolysis into a high-purity sodium alcholate | Herbert Hovestadt, Ludwig Lange, Kurt A. Ruppert, Erich Splett | 1989-08-15 |
| 4767453 | Process for creating the flow properties to sodium-production filter residues | Herbert Hovestadt, Ludwig Lange, Kurt A. Ruppert, Erich Splett | 1988-08-30 |
| 4640832 | Process for the production of sodium polysulfides from the elements sodium and sulfur | Friedrich Bittner, Herbert Hovestadt, Ludwig Lange, Erich Splett | 1987-02-03 |
| 4584068 | Device and process for the fused-salt electrolysis of alkali metal halides | Ludwig Lange, Friederich Hammer, Hans-Josef Ludwig | 1986-04-22 |
| 4536938 | Process for the continuous production of solid alkali metal strands | Friedrich Hammer, Ludwig Lange | 1985-08-27 |