Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114693 | Process for the production of silicon nitride and product made according to the process | Jochen Hintermayer, Ernst Graf, Georg Schroll, Wolfgang Kobler | 1992-05-19 |
| 4943317 | Agent for desulphurizing iron melts, a process for the production thereof and a process for desulphurizing iron melts with the use of said agent | Helmut Lischka, Gerd Hieber | 1990-07-24 |
| 4832739 | Process for desulfurizing molten iron | Walter Meichsner, Manfred Tutte, Karl-Heinz Peters | 1989-05-23 |
| 4764211 | Fine-grained agent for desulfurizing molten iron | Walter Meichsner, Manfred Tutte, Karl-Heinz Peters | 1988-08-16 |
| 4592777 | Method, process and composition for desulfurizing pig-iron melts | Heinrich Rellermeyer, Walter Meichsner | 1986-06-03 |
| 4540436 | Treatment agent for cast iron melts and a process for the production thereof | Friedrich Wolfsgruber, Ernst A. Weiser, Hans Kern, Karl J. Reifferscheid | 1985-09-10 |
| 4430118 | Desulfurization agent | Alfred Freissmuth, Walter Meichsner | 1984-02-07 |
| 4315773 | Desulfurization mixture and process for desulfurizing pig iron | Alfred Freissmuth, Heinrich Rock | 1982-02-16 |
| 4260413 | Desulfurizing composition, process for producing them and desulfurization of pig iron and steel | Alfred Freissmuth, Heinrich Rock | 1981-04-07 |
| 4194902 | Desulfurization agent for ferrous melts and method of using the same | — | 1980-03-25 |