Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4260704 | Resins based on novolaks, their production and their use as tackifiers | Manfred Schmidt, Theo Kemperman, Dieter Freitag, Hermann Fries | 1981-04-07 |
| 4182697 | Process for the preparation of boron-containing phenol-formaldehyde resins | Manfred Schmidt, Dieter Freitag, Hermann Fries | 1980-01-08 |