Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859354 | Nitrogen-containing additives for non-aqueous functional fluids | Robert M. O'Neil, Hermann O. Wirth | 1989-08-22 |
| 4810399 | Aminomethyl derivatives of benzothiazolinethione as lubricant additives | Hugo Camenzind | 1989-03-07 |
| 4803001 | Aminomethyl derivatives of benzothiazolinethione as lubricant additives | Hugo Camenzind | 1989-02-07 |