Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6576682 | Use of reactive amines for the preparation for polyurethane foams | Oliver Eyrisch, Ralf Hoffmann | 2003-06-10 |
| 6403664 | Combination of metal salts of ricinoleic acid with reactive amines in producing polyurethane forms | Ralf Hoffmann | 2002-06-11 |
| 6194475 | Use of metal salts of ricinoleic acid in producing polyurethane | Tammo Boinowitz, Georg Burkhart, Ralf Hoffmann, Felix Muller, Andreas Weier +2 more | 2001-02-27 |
| 5132333 | Method for the preparation of flexible polyurethane foams with reduced hardness comprising adding a hydroxycarboxylic acid salt | Georg Burkhart, Volker Zellmer | 1992-07-21 |
| 5093376 | Method for the preparation of flexible polyester polyurethane foams | Volker Mohring, Volker Zellmer, Georg Burkhart, Jurgen Fock | 1992-03-03 |