Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8158053 | Refractory articles | David A. Bell, David L. Jones, Kassim Juma, Andreas Ansorge, Martin Schmidt | 2012-04-17 |
| 7138084 | Refractory articles | David A. Bell, David L. Jones, Kassim Juma | 2006-11-21 |
| 6635339 | Open-cell expanded ceramic with a high level of strength, and process for the production thereof | Joerg Adler, Michael Teichgraeber, Gisela Standke, Heike Stoever, Reinhard Stoetzel | 2003-10-21 |
| 4524954 | Method of operating a mixer type hot metal car for the transport of molten iron and a device for carrying out the method | Willem Baas, Tette Hof, Heinrich Comes, Hubert Krampe | 1985-06-25 |
| 4438515 | Protection of graphite electrodes | Dietger Dunkelmann, Josef Schiffarth | 1984-03-20 |
| 4435510 | Protection of graphite electrodes | Dennis Greensmith, Roderic H. Hammerton, Colin J. Wall, Dietger Dunkelmann, Josef Schiffarth | 1984-03-06 |
| 4259128 | Coating carbon electrodes | Dieter Dunkelmann, Josef Schiffarth | 1981-03-31 |
| 4209325 | Desulphuration of metals | Stephen M. Cooper, Thomas H. Webster | 1980-06-24 |