Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879361 | Preparation of bead polymers from water-soluble, ethylenically unsaturated monomers | Manfred Niessner, Wilfried Heide, Heinrich Hartmann, Karl-Clemens Peters | 1989-11-07 |
| 4853433 | Epoxy resin materials having an improved shelf life | Rainer Blum, Rolf Osterloh, Hans Sander | 1989-08-01 |
| 4845147 | Nonaqueous polymer dispersions | Rainer Blum, Rolf Osterloh, Hans Sander | 1989-07-04 |
| 4818341 | Production of paper and paperboard of high dry strength | Hans-Juergen Degen, Sigberg Pfohl, Volkmar Weberndoerfer, Michael Kroener, Andreas Stange | 1989-04-04 |