Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882446 | Metal dihydrocarbyl-dithiophosphyl-dithiophosphates their manufacture and use as additives for lubricants | Jacques Lallement, Pierre Marchand, Guy Parc, Nicole Thevenin | 1989-11-21 |
| 4839069 | Olefin polysulfide compositions their manufacture and use as additives for lubricants | Lucienne Briquet, Jacques Lallement, Guy Parc | 1989-06-13 |
| 4795576 | Polysulfided olefin compositions, their preparation and use as additives for lubricants | Lucienne Briquet, Guy Parc, Daniel Paquer | 1989-01-03 |