Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866731 | Electric furnace arrangement | Ernst Riegler, Hubert Hammerschmid | 1989-09-12 |
| 4841542 | Electric furnace arrangement | Ernst Riegler, Johann Muhlbauer | 1989-06-20 |
| 4718645 | Ladle stand arrangement for treating molten metal | Ernst Riegler | 1988-01-12 |
| 4644557 | Process for the production of calcium carbide and a shaft furnace for carrying out the process | Joachim Ebeling, Peter Friedrich, Herbert Jekat, Walter Lugscheider, Ernst Riegler +2 more | 1987-02-17 |
| 4643404 | Tiltable metallurgical vessel arrangement | Ernst Riegler, Johann Muhlbauer | 1987-02-17 |
| 4606038 | Plant for producing calcium carbide | Walter Lugscheider, Ernst Riegler | 1986-08-12 |
| 4546483 | Plasma melting furnace arrangement | Walter Lugscheider, Alois Leutgob, Ernst Riegler, Othmar Puhringer | 1985-10-08 |
| 4518419 | Method of carrying out metallurgical or chemical processes in a shaft furnace, and a low shaft furnace therefor | Walter Lugscheider, Ernst Riegler | 1985-05-21 |
| 4504307 | Method for carrying out melting, melt-metallurgical and/or reduction-metallurgical processes in a plasma melting furnace as well as an arrangement for carrying out the method | Walter Lugscheider, Othmar Steipe, Ernst Riegler | 1985-03-12 |
| 4493088 | Plasma melting furnace | Walter Lugscheider, Helmut D. Kilches, Ernst Riegler | 1985-01-08 |
| 4436290 | Plasma melting furnace arrangement | Helmut D. Kilches, Walter Lugscheider, Ernst Riegler | 1984-03-13 |
| 4437187 | Electric furnace arrangement | Ernst Riegler | 1984-03-13 |
| 4423512 | Plasma melting furnace | Walter Lugscheider, Ernst Riegler | 1983-12-27 |
| 4423515 | Electric furnace | Ernst Riegler | 1983-12-27 |
| 4198035 | Blowing lance media-supply arrangement | Hellmuth Smejkal | 1980-04-15 |