Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886859 | Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use | Walter Denzinger, Heinrich Hartmann, Felix Richter, Hans-Jurgen Raubenheimer, Ekhard Winkler | 1989-12-12 |