Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4745172 | Phenolic resins using polyamines and polyethers in their production | Thomas Scholl, Reinhard Preuss, Manfred Abele, Theo Kempermann | 1988-05-17 |
| 4260704 | Resins based on novolaks, their production and their use as tackifiers | Manfred Schmidt, Theo Kemperman, Dieter Freitag, Erich Esch | 1981-04-07 |
| 4182697 | Process for the preparation of boron-containing phenol-formaldehyde resins | Manfred Schmidt, Dieter Freitag, Erich Esch | 1980-01-08 |