Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837376 | Process for refining silicon and silicon purified thereby | Ingo Schwirtlich, Horst Lange | 1989-06-06 |
| 4755220 | Materials resistant to metal and salt melts, their production and their use | Peter Woditsch, Horst Lange, Ingo Schwirtlich | 1988-07-05 |
| 4321237 | Treating hydrolysis residues from preparation of titanium dioxide | Peter Panek, Peter Woditsch | 1982-03-23 |