Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878943 | Process of dezincifying a material flow when operating a pig-iron production plant | — | 1989-11-07 |
| 4861369 | Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process | Ludwig von Bogdandy, Kurt Stift, Gero Papst, Rolf Hauk | 1989-08-29 |
| 4805880 | Fluidized bed arrangement for the production of molten pig iron and steel pre-products | Rolf Hauk, Gero Papst, Klaus Langner, Michael Nagl, Leopold Seirlehner | 1989-02-21 |