Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5137648 | Overbased metal sulphonate composition | John F. Marsh, Marc Vernet | 1992-08-11 |
| 5112506 | Overbased metal sulphonate composition | John F. Marsh, Marc Vernet | 1992-05-12 |
| 5089155 | Overbased magnesium sulphonate composition | John F. Marsh, Marc Vernet | 1992-02-18 |
| 5071576 | Lubricant oil additive | Marc Vernet | 1991-12-10 |