Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5780690 | Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds | Klaus Berg, Gerhard Fennhoff, Ralf Pakull, Hans-Josef Buysch, Alfred Eitel +2 more | 1998-07-14 |
| 5302774 | Process for the production of bisphenols | Klaus Berg, Hans-Josef Buysch, Alfred Eitel, Gerhard Fennhoff, Otto Immel +2 more | 1994-04-12 |