Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6656994 | Use of polysulfide-free preparations as an additive for loam or clay-based construction materials | Stefan Dreher, Joachim Roser, Joachim Pakusch, Karl Boettger | 2003-12-02 |
| 6051634 | Water-dispersible or water-soluble polyurethanes as additives for building materials | Hans-Josef Laas, Jan Mazanek, Karl-Georg Bottger, Anke Reinschmidt | 2000-04-18 |
| 6007619 | Use of nonionic, water-dispersible polyisocyanates as concrete additives | Hans-Josef Laas, Martin Brahm, Jan Mazanek, Hermann Kober, Manfred Schonfelder +2 more | 1999-12-28 |