Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12392300 | Vehicle with gasoline particulate filter soot regeneration strategy with criteria emission reduction for low NOX emissions | Sergio Quelhas, Rafat F. Hattar | 2025-08-19 |
| 12247504 | Systems and methods for catalyst health diagnosing and fuel system control improvement | Rafat F. Hattar, Janean Ellen Potter, Erika L Pruski | 2025-03-11 |
| 11913401 | Engine emission control systems for deceleration fuel cutoff events and cold starts | Vijay Ramappan, Rafat F. Hattar, Jeffrey M. Kaiser, Joseph Shelton | 2024-02-27 |
| 11788455 | Systems and methods for recirculation of engine exhaust gas within an exhaust system having a buffer tank | Rafat F. Hattar | 2023-10-17 |
| 11725601 | Systems and methods for recirculation of engine exhaust gas within an exhaust system | Rafat F. Hattar | 2023-08-15 |
| 11629625 | Systems and methods of engine exhaust air injection before and after catalytic converters | Rafat F. Hattar, John Michael Ellenberger, Philipp A Seyfried | 2023-04-18 |
| 11519317 | Engine systems with exhaust air injection after three-way catalytic converters for non stoichiometric rich operation | Rafat F. Hattar | 2022-12-06 |