Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5391804 | Process for the preparation of mono-N-.beta.-cyanoethylanilines | Wilfried Kohler, Karl-Johann Wemmje | 1995-02-21 |
| 4897482 | Process for the preparation of oligomeric 2,2,4-trimethyl-1,2-dihydroquinoline | Karl-Johann Wemmje, Heinz Hammer | 1990-01-30 |
| 4690998 | Special epoxy resins | Bernd Wahle, Dieter Freitag, Walter Uerdingen, Heinrich Heine | 1987-09-01 |