Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360454 | Tanning of leather and fur | Norbert Grief, Knut Oppenlaender, Hermann Birkhofer, Johannes P. Dix | 1994-11-01 |
| 5342916 | Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders | Juergen Weiser, Wolfgang Reuther, Karl Stork, Ortwin Schaffer, Gernot Franzmann +3 more | 1994-08-30 |
| 5326499 | Antifoams for the paper industry, based on oil-in-water emulsions | Knut Oppenlaender, Rudolf Schuhmacher, Andreas Hohmann, Gabriele Dralle-Vos | 1994-07-05 |
| 5282872 | Fuel for Otto-cycle engines | Knut Oppenlaender, Juergen Mohr, Roland Schwen, Klaus Barthold, Juergen Thomas | 1994-02-01 |