Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946029 | Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds | Gerhard Frank, Wilfried Seyfert, Peter Stops | 1990-08-07 |
| 4810798 | Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures | Paul Panitz, Wilfried Seyfert, Peter Stops | 1989-03-07 |
| 4788326 | Preparation of 4-pentenoates | Wolfgang Hoelderich, Wolfgang Richter, Klaus-Dieter Malsch | 1988-11-29 |
| 4772746 | Preparation of 4-pentenoates | Wolfgang Hoelderich, Rolf Fischer, Klaus-Dieter Malsch | 1988-09-20 |
| 4743702 | Preparation of aliphatic dinitriles | Wolfgang Hoelderich, Peter Magnussen, Hans Leitner, Jost H. Manegold, Wolfgang Leitenberger | 1988-05-10 |