Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372609 | Self-tanning, pretanning and assist tanning of pelts and skin pelts and retanning of leather and skin | Juergen Weiser, Hermann Birkhofer, Karl Stork, Ortwin Schaffer | 1994-12-13 |
| 5356938 | Recycling of cured aminoplast resins | Juergen Weiser, Erwin Hahn | 1994-10-18 |
| 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, Karl Stork, Ortwin Schaffer, Gernot Franzmann, Thomas Schwerzel +3 more | 1994-08-30 |
| 5332830 | Preparation of N-hydroxyazoles | Klaus Horchler von Locquenghien, Wolfgang Hoelderich, Ulf Baus, Erwin Hahn | 1994-07-26 |
| 5322915 | Modified melamine-formaldehyde resins | Juergen Weiser, Rolf Fikentscher, Wolfgang Fath, Heinz Berbner, Hans D. Zettler +1 more | 1994-06-21 |