Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665149 | Anti-corrosion pigment and use thereof | Karl Gotzmann, Hans Nagerl, Sieghard Gobelbecker | 1997-09-09 |
| 5607990 | Method for making phenol-formaldehyde resins flame-resistant | Klaus Frankenfeld, Hans-Dieter N agerl, Klaus Sommer | 1997-03-04 |