Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844826 | Use of organosilicon compounds to thicken oils | Klaus Hoffmann | 1989-07-04 |
| 4837244 | Method for the preparation of polyurethane foams | Georg Burkhart, Volker Moring | 1989-06-06 |
| 4833225 | Polyquaternary polysiloxane polymers, their synthesis and use in cosmetic preparations | Manfred Krakenberg | 1989-05-23 |