Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6042890 | Process for producing a strengthened fiber assembly | Harmut Rüf, Heinrich Firgo, Siegfried Ambrosch, Christian Schlossnikl | 2000-03-28 |
| 5968434 | Process of making cellulose moldings and fibers | Stefan Zikeli, Ernst Rauch, Hermann Koberger, Friedrich Ecker, Hartmut Ruf +1 more | 1999-10-19 |
| 5798125 | Device for the preparation of cellulose mouldings | Stefan Zikeli, Ernst Rauch, Hermann Koberger, Friedrich Ecker, Hartmut Ruf +1 more | 1998-08-25 |
| 5698151 | Process of making cellulose fibres | Stefan Zikeli, Friedrich Ecker, Franz Schwenninger, Hartmut Ruf | 1997-12-16 |
| 5589125 | Process of and apparatus for making cellulose mouldings | Stefan Zikeli, Ernst Rauch, Hermann Koberger, Friedrich Ecker, Hartmut Ruf +1 more | 1996-12-31 |
| 5543101 | Process of making cellulose fibres | Hartmut Ruf, Markus Eibl | 1996-08-06 |
| 5330567 | Process and arrangement for preparing a solution of cellulose | Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Heinrich Firgo | 1994-07-19 |
| 5252284 | Method of producing shaped cellulosic articles | Heinrich Firgo, Dieter Eichinger, Stefan Zikeli | 1993-10-12 |
| 5216144 | Method of producing shaped cellulosic articles | Dieter Eichinger, Stephan Astegger, Heinrich Firgo, Peter Hinterholzer, Karin Weinzierl +1 more | 1993-06-01 |
| 5094690 | Process and arrangement for preparing a solution of cellulose | Stefan Zikeli, Bernd Wolschner, Dieter Eichinger, Heinrich Firgo | 1992-03-10 |