Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7384521 | Method for reducing cell voltage and increasing cell stability by in-situ formation of slots in a Soderberg anode | Xiangwen Wang, Jerry L. Roddy, Alain J. Belda | 2008-06-10 |
| 6863788 | Interlocking wettable ceramic tiles | Guy L. Fredrickson, Eric Groat, Thomas Mroz, Alan Ulicny, Mark F. Walker | 2005-03-08 |
| 5286359 | Alumina reduction cell | Nolan E. Richards | 1994-02-15 |
| 5129998 | Refractory hard metal shapes for aluminum production | Douglas V. Stewart, Nolan E. Richards | 1992-07-14 |
| 5114545 | Electrolyte chemistry for improved performance in modern industrial alumina reduction cells | Thomas R. Alcorn, Luke R. Trembley | 1992-05-19 |
| 4673478 | Alumina reduction cell | Frank L. Gunnip | 1987-06-16 |
| 4654130 | Method for improved alumina control in aluminum electrolytic cells employing point feeders | William E. Watts, Claude A. Wilson | 1987-03-31 |
| 4631121 | Alumina reduction cell | Douglas V. Stewart, John T. Willett | 1986-12-23 |
| 4591419 | Protective barrier for alumina reduction cells | Jerris C. Moeller, Douglas V. Stewart | 1986-05-27 |
| 4561958 | Alumina reduction cell | Douglas V. Stewart | 1985-12-31 |
| 4498966 | Alumina reduction cell | — | 1985-02-12 |
| 4450054 | Alumina reduction cell | — | 1984-05-22 |
| 4450063 | Probe for alumina concentration meter | Thomas J. Johnston, Nolan E. Richards | 1984-05-22 |
| 4436598 | Alumina reduction cell | John T. Willett | 1984-03-13 |
| 4425201 | Method for improved alumina control in aluminum electrolytic cells | Claude A. Wilson | 1984-01-10 |
| T993002 | Refractory surfaces for alumina reduction cell cathodes and methods for providing such surfaces | Howard I. Kaplan, Jerry H. Bryce, Thomas J. Johnston, Jan Pottinger, Curtis J. McMinn +2 more | 1980-04-01 |