Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5739212 | Water-soluble graft polymers | Konrad Wutz, Josef Weichmann, Alfred Kern | 1998-04-14 |
| 5071945 | Process for the production of sulphonic acid group-containing condensation products with a low content of free formaldehyde | Josef Weichmann, Manfred Bichler, Alfred Kern | 1991-12-10 |
| 4284433 | Additives for water-hardening binding agents | Alois Aignesberger, Jean-Pierre Deppen | 1981-08-18 |