Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4705860 | Quaternary ammonium salts and their use as drag reducing agents | Dieter Ohlendorf, Heinz Hoffmann, Werner Interthal | 1987-11-10 |
| 4263441 | Novel fluorine-containing benz-azole derivatives, process for their manufacture and their use as optical brighteners | Erich Schinzel, Gunter Rosch | 1981-04-21 |