Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4521246 | Operating a blast furnace with the injection of hot reducing gases | Nikolas G. Ponghis | 1985-06-04 |
| 4421553 | Process for operating a blast furnace | Nikolas G. Ponghis, Roland Vidal | 1983-12-20 |