Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304525 | Catalyst for the preparation of aniline | Otto Immel, Helmut Waldmann, Rudolf Braden, Christian Frohlich, Wilfried Niemeier | 1994-04-19 |
| 4371691 | Preparation of polycarbonate from specific crude bisphenols | Volker Serini, Rainer Neumann, Dieter Freitag, Hans-Helmut Schwarz | 1983-02-01 |
| 4348542 | Process for the production of mixtures of alkylated aromatic hydroxy compounds | Volker Serini, Rainer Neumann, Dieter Freitag, Jürgen Heuser, Hans-Helmut Schwarz | 1982-09-07 |
| 4319053 | Process for the preparation of 4,4'-dihydroxy-3,3',5,5'-tetraalkyl-diphenylalkanes | Jürgen Heuser, Gunther Jeromin, Hans-Helmut Schwarz | 1982-03-09 |