Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5433767 | Direct reduction of iron oxide materials with solid carbonaceous reducing agents | Wolfgang Bresser, Martin Hirsch, Bernd Kosters | 1995-07-18 |
| 5382277 | Process for reducing fine-grain iron oxide materials with a gas | — | 1995-01-17 |
| 4806158 | Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducing agents | Martin Hirsch, Harry Serbent | 1989-02-21 |