Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5599939 | Process for the preparation of 2,3,5,6-tetrachloropyridine | Niels Friis | 1997-02-04 |
| 5591857 | Process for the preparation of 2,3,5,6-tetrachloropyridine | Niels Friis | 1997-01-07 |