Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514578 | Process for the preparation of trimethylolpropane | Otto Immel, Hans-Helmut Schwarz, Eberhard Bandtel | 1985-04-30 |
| 4247485 | Process for the preparation of 2,2-dimethylolalkanals | Otto Immel, Hans-Helmut Schwarz | 1981-01-27 |