Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696996 | Preparation of polyphenylene ethers, and an apparatus for this purpose | Hermann Brandt, Hermann Fischer, Hermann Dreher, Juergen Hambrecht, Herbert Naarmann +6 more | 1987-09-29 |
| 4654418 | Continuous removal of the catalyst from polyphenylene ethers | Rosemarie Berger, Hermann Dreher, Juergen Hambrecht, Rudi W. Reffert, Johann Swoboda +2 more | 1987-03-31 |
| 4540772 | Continuous preparation of nylon from aqueous salt solution in precondensation zone having baffles | Gunter Pipper, Franz Schmidt, Rainer Theysohn, Siegfried Riegger, Hermann Fischer +2 more | 1985-09-10 |
| 4436870 | Production of molding materials containing polyphenylene ethers | Klaus Hinselmann, Herbert Naarmann, Adolf Echte, Albert Nikles, Rudi W. Reffert +1 more | 1984-03-13 |