Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681476 | Process for the purification of groundwater | John Kahsnitz | 1997-10-28 |
| 5633358 | Process for bleaching aqueous surfactant solutions | Juergen Gruetzke, Stefan Schmidt, Uwe Tanger | 1997-05-27 |