Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861895 | Treatment of aqueous solutions obtained in the carbalkoxylation of olefinically unsaturated compounds | Werner Bertleff, Robert Maerkl, Peter Magnussen, Gebhard Kuehn | 1989-08-29 |
| 4810798 | Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures | Hubert Lendle, Paul Panitz, Wilfried Seyfert | 1989-03-07 |