Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4592821 | Electrolysis tank with a current strength of greater than 250,000 amperes for the production of aluminum by means of the Hall-Heroult process | Bernard Langon, Joseph Chaffy | 1986-06-03 |
| 4533452 | Electrolysis tank, for the production of aluminum, having a floating conductive screen | Michel Leroy | 1985-08-06 |
| 4532017 | Floating cathode elements based on electrically conductive refractory material, for the production of aluminum by electrolysis | Philippe Varin, Yves Bertaud, Michel Leroy | 1985-07-30 |
| 4431491 | Process and apparatus for accurately controlling the rate of introduction and the content of alumina in an igneous electrolysis tank in the production of aluminium | Paul Bonny, Jean-Louis Gerphagnon, Gerard J. P. B. Laboure, Pierre Homsi, Bernard Langon | 1984-02-14 |