Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810798 | Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures | Paul Panitz, Wilfried Seyfert, Peter Stops | 1989-03-07 |