Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6813884 | Method of treating diesel exhaust gases | Albert Nazipovich Shigapov, Brendan Patrick Carberry | 2004-11-09 |
| 6810660 | System for minimizing the impact of poisoning of automotive exhaust aftertreatment systems | Jeffrey Scott Hepburn, Carolyn Parks Hubbard, Gang Guo, Lifeng Xu | 2004-11-02 |
| 6742326 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature | Lifeng Xu | 2004-06-01 |
| 6698191 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature | Lifeng Xu | 2004-03-02 |