Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839094 | Overbased alkali metal additives | John F. Marsh | 1989-06-13 |
| 4797217 | Overbased additives | — | 1989-01-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839094 | Overbased alkali metal additives | John F. Marsh | 1989-06-13 |
| 4797217 | Overbased additives | — | 1989-01-10 |