Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840744 | Modified succinimides and lubricating oil compositions containing the same | Frank Plavac, Timothy R. Erdman | 1989-06-20 |
| 4802893 | Modified Succinimides | Frank Plavac | 1989-02-07 |
| 4803002 | Carbonate treated dispersants | — | 1989-02-07 |
| 4798612 | Modified succinimides (x) | Frank Plavac | 1989-01-17 |