Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6811677 | Electrolytic cell for the production of aluminum and a method for maintaining a crust on a sidewall and for recovering electricity | Kai Johansen, Per Olav Nos | 2004-11-02 |
| 6805723 | Method and reactor for production of aluminum by carbothermic reduction of alumina | Kai Johansen | 2004-10-19 |