Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877824 | Sulfur-containing compounds as antioxidants for lubricants and elastomers | — | 1989-10-31 |
| 4874885 | Process for the preparation of mercaptomethylphenols | Werner Stegmann, Hans-Rudolf Meier, Roger Martin, Reto Luisoli | 1989-10-17 |
| 4828741 | N-substituted tetrahydroquinolines for use as antioxidants in lubricants | Hans-Rudolf Meier | 1989-05-09 |