Issued Patents All Time
Showing 51–59 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7287370 | NOx-trap | Stephen Poulston | 2007-10-30 |
| 6948308 | Combatting air pollution | Guy Richard Chandler, Alan Francis Diwell | 2005-09-27 |
| 6713030 | Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of NH3 | Guy Richard Chandler, Claus Friedrich Goersmann, Valerie Anne Self | 2004-03-30 |
| 6634169 | Method and system for maintaining efficiency of a three-way catalyst | Paul Joseph Andersen, Todd Howard Ballinger, David S. Lafyatis, Andrew Peter Walker | 2003-10-21 |
| 6546717 | Combatting air pollution | Guy Richard Chandler, Alan Francis Diwell | 2003-04-15 |
| 6479023 | System for converting particulate matter in gasoline engine exhaust gases | Julia Margaret Evans, Stephen Poulston, Andrew Peter Walker | 2002-11-12 |
| 5993762 | Method of using catalyst containing noble metal and cerium dioxide | John Hayes, Graham P. Ansell, Helen A. Hatcher | 1999-11-30 |
| 5943857 | Diesel engine exhaust gas purification method | Graham P. Ansell, Janet Mary Fisher, Peter Geoffrey Gray, Hugh Gavin Charles Hamilton | 1999-08-31 |
| 5480854 | Catalyst | John Hayes, Graham P. Ansell, Helen A. Hatcher | 1996-01-02 |