Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5288926 | Process for preparing a bisphenol | Emil Patrascu, Dieter Tank, Jochen Gressmann, Johann-Wilhelm Frey | 1994-02-22 |
| 4895905 | Gel-type chelating resins and a process for removal of multi-valent, alkaline earth or heavy metal cations from solutions | Hans-Peter Schneider | 1990-01-23 |