Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7077945 | Cu—Ni—Fe anode for use in aluminum producing electrolytic cell | S. Craig Bergsma, Craig W. Brown, Donald R Bradford, Robert J. Barnett | 2006-07-18 |
| 6866768 | Electrolytic cell for production of aluminum from alumina | Donald R Bradford, Robert J. Barnett | 2005-03-15 |
| 6837982 | Maintaining molten salt electrolyte concentration in aluminum-producing electrolytic cell | Robert J. Barnett, Donald R Bradford | 2005-01-04 |
| 6811676 | Electrolytic cell for production of aluminum from alumina | Donald R Bradford, Robert J. Barnett | 2004-11-02 |
| 6800191 | Electrolytic cell for producing aluminum employing planar anodes | Robert J. Barnett, Donald R Bradford | 2004-10-05 |
| 6558525 | Anode for use in aluminum producing electrolytic cell | Donald R Bradford, Robert J. Barnett | 2003-05-06 |
| 6468483 | Process for treating alumina-bearing ores to recover metal values therefrom | Robert J. Barnett | 2002-10-22 |
| 6248302 | Process for treating red mud to recover metal values therefrom | Robert J. Barnett | 2001-06-19 |
| 6231822 | Recovering chloride and sulfate compounds from spent potliner | Robert J. Barnett | 2001-05-15 |
| 6217836 | Recovering carbon, silica and alumina from spent potliner | Robert J. Barnett | 2001-04-17 |
| 6217840 | Production of fumed silica | Robert J. Barnett | 2001-04-17 |
| 6193944 | Method of recovering fumed silica from spent potliner | Robert J. Barnett | 2001-02-27 |
| 6187275 | Recovery of AlF3 from spent potliner | Robert J. Barnett | 2001-02-13 |
| 6123908 | Method of treating spent potliner material from aluminum reduction cells | Robert J. Barnett | 2000-09-26 |
| 5955042 | Method of treating spent potliner material from aluminum reduction cells | Robert J. Barnett | 1999-09-21 |
| 5723097 | Method of treating spent potliner material from aluminum reduction cells | Robert J. Barnett | 1998-03-03 |