Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7868166 | Continuous process for the production and/or workup of polysaccharide derivatives | Martin Lohrie, Bernd Schriewer, Holger Tanneberger | 2011-01-11 |
| 7259257 | Process for producing particulate, water-soluble cellulose derivatives using a superheated gas mixture containing steam | Hartwig Schlesiger, Martin Morning, Gunter Weber, Gerd Sonnenberg, Rene Kiesewetter | 2007-08-21 |
| 5136013 | Process for the production of low-melting polymers containing at least one Z-configured stilbene group | Dieter Arlt, Axel Bader, Karsten-Josef Idel, Frank Kleiner | 1992-08-04 |
| 5134219 | Stiff-chain polyheterocycles having improved solubility, a process for their production and their use | Hans R. Kricheldorf, Jurgen Engelhardt, Ralf Pakull, Ulrich Leyrer | 1992-07-28 |
| 5105004 | Aromatic ethers | Knud Reuter, Dieter Freitag, Gunther Weymans, Rolf Dhein, Paul J. Mayska +2 more | 1992-04-14 |
| 5084550 | Copolycarbonate from mixture of polyarylene diol | Ralf Pakull, Dieter Freitag, Karsten-Josef Idel, Hans R. Kricheldorf, Dierik Lubbers | 1992-01-28 |
| 5068300 | Bifunctional stilbene compounds containing at least one Z-configurated stilbene group, process for their preparation and their use for the preparation of polymers | Dieter Arlt, Axel Bader | 1991-11-26 |
| 5053477 | Process for the production of aromatic polyether ketones | Sabine Kern, Joachim Genz, Frank Kleiner, Karsten-Josef Idel | 1991-10-01 |
| 5037939 | Thermotropic, fully aromatic polyesters prepared by polycondensation of aromatic diphenols and aromatic carboxylic acids | Dieter Freitag, Karsten-Josef Idel | 1991-08-06 |
| 5021543 | Process for the production of bifunctional OH-terminated polyphenylene oxides with dipolar aprotic solvent | Paul J. Mayska, Dieter Freitag, Karsten-Josef Idel | 1991-06-04 |
| 4999414 | Process for the production of aromatic polyether ketones | Joachim Genz, Erhard Tresper, Karsten-Josef Idel, Ludwig Bottenbruch | 1991-03-12 |
| 4985532 | Thermotropic polyesters, a process for their production and their use for the production of moldings, filaments and films | Ralf Pakull, Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe | 1991-01-15 |
| 4970286 | Thermotropic, fully aromatic polyesters having a low processing temperature, a process for their production and their use for the production of moldings, filaments, fibers and films | Joachim Genz, Karsten-Josef Idel, Carl Casser | 1990-11-13 |
| 4954604 | Process for the production of aromatic polyether ketones | Joachim Genz, Hans-Rudolf Dicke, Frank Kleiner | 1990-09-04 |
| 4954606 | Solid phase post polymerization condensation of thermotropic polyester imides | Hans-Rudolf Dicke, Joachim Genz, Ludwig Bottenbruch | 1990-09-04 |
| 4948863 | Thermotropic polyester imide from N-(3-hydroxy phenyl) trimellitic acid imide | Hans-Rudolf Dicke, Joachim Genz, Ludwig Bottenbruch | 1990-08-14 |
| 4931534 | Thermotropic aromatic polyesters, a process for their production and their use for the production of moldings, filaments, fibers and films | Ralf Pakull, Joachim Genz, Karsten-Josef Idel, Hans R. Kricheldorf, Volker Doring | 1990-06-05 |
| 4912193 | Thermotropic aromatic polyester based on p-hydroxy benzoic acid, 4,4'-dihydroxy diphenyl, terephthalic acid, and isophthalic acid | Hans-Rudolf Dicke, Ludwig Bottenbruch | 1990-03-27 |
| 4912180 | Process for the preparation of polyarylene sulphides | Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Joachim Genz | 1990-03-27 |
| 4906712 | Process for the preparation of polyarylene sulphides | Ernst-Ulrich Dorf, Hans-Rudolph Dicke, Wolfgang Russeler, Joachim Genz | 1990-03-06 |
| 4861857 | Thermotropic polyesterimide from N-carboxyalkylene trimellitimide having excellent processibility, a process for their production and their use for the production of moldings, filaments, fibers and films | Hans R. Kricheldorf, Ralf Pakull, Hans-Rudolf Dicke | 1989-08-29 |
| 4835243 | Thermotropic aromatic polymers with high elongation at break, processes for their preparation and their use for the production of moulded articles, filaments, fibres and films | Hans-Rudolf Dicke, Erich Hammerschmidt, Ludwig Bottenbruch, Frank Kleiner, Heinz U. Blank | 1989-05-30 |
| 4806619 | Thermotropic aromatic polyesters having a high deflection temperature under load and excellent mechanical properties, a process for their preparation and their use for the production of moldings, filaments, fibres and films | Hans-Rudolf Dicke, Erich Hammerschmidt, Dieter Freitag | 1989-02-21 |
| 4801677 | Thermotropic aromatic polyester with high thermal stability | Hans-Rudolf Dicke, Ludwig Bottenbruch, Dieter Freitag, Ulrich Biskup | 1989-01-31 |
| 4797467 | Thermoplastic polycarbonate branched with tetra-hydroxyaryl-bis-quinoxaline | Hans-Rudolf Dicke, Dieter Freitag | 1989-01-10 |