Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5849255 | Treatment of diesel exhaust gas using zeolite catalyst | John E. Sawyer | 1998-12-15 |
| 5672557 | Paladium-containing three-way automotive catalysts having unique support | W. Burton Williamson, Ronald Silver | 1997-09-30 |
| 5116800 | High durability and exhuast catalyst with low hydrogen sulfide emissions | W. Burton Williamson, Douglas G. Linden | 1992-05-26 |
| 5041407 | High-temperature three-way catalyst for treating automotive exhaust gases | W. Burton Williamson, Douglas G. Linden | 1991-08-20 |
| 5024824 | Layered automotive catalytic composite | Michael G. Henk | 1991-06-18 |
| 4923842 | Lanthanum containing catalyst for treating automotive exhaust | — | 1990-05-08 |
| 4868148 | Layered automotive catalytic composite | Michael G. Henk | 1989-09-19 |