Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5023226 | Ruthenium supported catalyst, its preparation and its use in the preparation of substituted or unsubstituted cyclohexylamine and substituted or unsubstituted dicyclohexylamine | Otto Immel, Hans-Helmut Schwarz | 1991-06-11 |
| 4990685 | Process for the preparation of aqueous formaldehyde solutions | Heinz-Jurgen Alpers, Karl-Heinz Dietz, Bernd-Ulrich Schenke | 1991-02-05 |
| 4943549 | Supported ruthenium catalyst, its preparation and its use in the preparation of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine | Otto Immel, Hans-Helmut Schwarz | 1990-07-24 |