Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869837 | Preparation of a basic salt | Gerhard d. van Wijngaarden | 1989-09-26 |
| 4798884 | Process for the working-up of ethylene/carbon monoxide alternating copolymers | Maarten M. Geuze | 1989-01-17 |