Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855394 | Reaction products and condensates based on substituted propyleneureas and their preparation | Harro Petersen, Rolf Osterloh, Eberhard Schupp, Werner Loch, Thomas Schwerzel | 1989-08-08 |
| 4818794 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Felix Richter, Hans-Juergen Raubenheimer, Ekhard Winkler | 1989-04-04 |
| 4818795 | Polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Felix Richter, Ekhard Winkler, Hans-Juergen Raubenheimer | 1989-04-04 |