Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4704430 | Thermoplastic moulding materials | Dieter Freitag, Werner Nouvertne, Peter Tacke | 1987-11-03 |
| 4645806 | Use of certain polyphenylene oxides for the production of aromatic block polyether-poly(ester) carbonates by the interfacial process | Dieter Freitag, Ludwig Bottenbruch, Peter Tacke | 1987-02-24 |
| 4410743 | Process for the preparation of 2,3-dimethylbutane-2,3-diol | Helmut Waldmann, Johann Grolig | 1983-10-18 |
| 4321143 | Treating effluent with peroxide and iron | Helmut Waldmann | 1982-03-23 |
| 4294703 | Hydrogen peroxide treatment of effluent | Helmut Waldmann | 1981-10-13 |