Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693681 | Increasing the molecular weight of polyesters | Rudolf Pfaendner, Kurt Hoffmann | 1997-12-02 |
| 5643985 | Process for the stabilization of and stabilizer mixtures for recycled plastics | Kurt Hoffmann, Rudolf Pfaendner, Hans Sander, Franciszek Sitek | 1997-07-01 |