Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308055 | Process of briquetting sponge iron-containing material | Harry Serbent, Werner Kaas, Justus Kuhn, deceased | 1981-12-29 |
| 4220631 | Process of calcining limestone or hydrated lime in a rotary kiln | Harry Serbent, Heinz Eichberger, Hermann Lommert, Herbert Lausch | 1980-09-02 |