Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6945077 | Method for treating steel plant slag | Jean-Luc Roth | 2005-09-20 |
| RE37897 | Method for making steel in a liquid melt-fed electric furnace | Andre Kremer, Jean-Luc Roth | 2002-11-05 |
| 6238452 | Method for making steel in a liquid melt-fed electric furnace | Andre Kremer, Jean-Luc Roth | 2001-05-29 |
| 4779846 | Method of improving permeability of metallurgical vessels, and material for implementing the same | Romain Henrion | 1988-10-25 |
| 4735398 | Method of improving the service life of permeable refractory elements in bottoms of metallurgical vessels | Romain Henrion | 1988-04-05 |
| 4696456 | Method of improving permeability of metallurgical vessels, and material for implementing the same | Romain Henrion | 1987-09-29 |
| 4690386 | Method of improving the service life of permeable refractory elements in bottoms of metallurgical vessels | Romain Henrion | 1987-09-01 |
| 4627601 | Installation for the production of steel by pre-smelting of pig iron | Aristide Berthet | 1986-12-09 |
| 4369060 | Process of refining of a metal bath in a crucible with oxygen blast at the top and crucible used | Paul Metz, Francois Schleimer, Ferdinand Goedert, Lucien Lorang, Romain Henrion +2 more | 1983-01-18 |