Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6544471 | Method and apparatus for producing high chromium content steels and/or ferroalloys in an electric arc converter | Karl-Heinz Deppner, Karl-Josef Schneider | 2003-04-08 |
| 6490312 | Direct-current arc furnace comprising a centric charging shaft for producing steel and a method therefor | Fritz-Peter Pleschiutschnigg | 2002-12-03 |
| 6471911 | Method and device for sealing a tap hole in metallurgical containers | Fritz-Peter Pleschiutschnigg | 2002-10-29 |
| 6149858 | Apparatus for producing steel utilizing an electrical steel making furnace vessel | Fritz-Peter Pleschiutschnigg | 2000-11-21 |
| 6068676 | Method and apparatus for producing high chromium content steels and/ or ferroalloys in an electric arc converter | Karl-Heinz Deppner, Karl-Josef Schneider | 2000-05-30 |