Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5013815 | Aromatic polyether sulfones, a process for their production and their use | Joachim Genz | 1991-05-07 |
| 4981919 | End capped thermally stable polyphenylene oxide (PPO) | Paul J. Mayska, Ludwig Bottenbruch | 1991-01-01 |
| 4960539 | Use of fluoromethylphenols as solvents for LC-polymers, and new fluoromethylphenols | Rainer Kuhn, Albrecht Marhold | 1990-10-02 |
| 4954606 | Solid phase post polymerization condensation of thermotropic polyester imides | Joachim Genz, Volker Eckhardt, Ludwig Bottenbruch | 1990-09-04 |
| 4954604 | Process for the production of aromatic polyether ketones | Joachim Genz, Volker Eckhardt, Frank Kleiner | 1990-09-04 |
| 4948863 | Thermotropic polyester imide from N-(3-hydroxy phenyl) trimellitic acid imide | Joachim Genz, Volker Eckhardt, Ludwig Bottenbruch | 1990-08-14 |
| 4945130 | Molding compositions of polycarbonate, thermotropic polymer, graft polymer and fluorinated polyolefin | Joachim Genz, Ulrich Grigo, Werner Nouvertne | 1990-07-31 |
| 4923660 | Process for the production of mouldings and films from thermotropic polymers | Bernd Willenberg, Aziz El Sayed, Harry Rohr | 1990-05-08 |
| 4912193 | Thermotropic aromatic polyester based on p-hydroxy benzoic acid, 4,4'-dihydroxy diphenyl, terephthalic acid, and isophthalic acid | Volker Eckhardt, Ludwig Bottenbruch | 1990-03-27 |
| 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, Volker Eckhardt | 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 | Volker Eckhardt, 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 | Volker Eckhardt, Erich Hammerschmidt, Dieter Freitag | 1989-02-21 |
| 4801677 | Thermotropic aromatic polyester with high thermal stability | Volker Eckhardt, Ludwig Bottenbruch, Dieter Freitag, Ulrich Biskup | 1989-01-31 |
| 4797467 | Thermoplastic polycarbonate branched with tetra-hydroxyaryl-bis-quinoxaline | Volker Eckhardt, Dieter Freitag | 1989-01-10 |
| 4780525 | Thermotropic, fully aromatic polyesters with excellent figidity and toughness, a process for their preparation and their use for the production of shaped articles, filaments, fibres and films | Volker Eckhardt, Ludwig Bottenbruch, Aziz E. Sayed | 1988-10-25 |
| 4743674 | Aromatic polyesters, processes for their preparation, and their use for the preparation of molecularly reinforced polymers | Walter Heitz, Uwe Kampschulte, Ludwig Bottenbruch, Dieter Freitag | 1988-05-10 |
| 4739058 | Tetra-(hydroxyaryl)-bis-quinoxalines and preparation thereof | Volker Eckhardt, Dieter Freitag | 1988-04-19 |
| 4716252 | Process for the preparation of bis-hydroxyphenyl-n-alkanes, new bis-hydroxyphenyl-n-alkanes and new alkanediones | Rudolf Wagner, Kurt Halcour, Volker Eckhardt | 1987-12-29 |
| 4701515 | Thermotropic aromatic polyester from 3,3'-diphenyl-4,4'-dihydroxy biphenyl and arylene dicarboxylic acid | Ludwig Bottenbruch, Karlfried Wedemeyer, Klaus-Christian Paetz, Aziz El Sayed | 1987-10-20 |
| 4668448 | Thermoplastic processing of thermotropic liquid-crystalline polymers under the influence of electric fields | Gunter Weber, Roland Vogelsgesang, Walter Simm, Hermann Brinkmeyer | 1987-05-26 |
| 4667011 | Thermotropic aromatic polyesters having high mechanical properties and good processability, a process for their preparation, and their use for the production of mouldings, filaments, fibres and films | Volker Eckhardt, Klaus-Christian Paetz, Aziz El Sayed | 1987-05-19 |
| 4631333 | Process for the preparation of polyimide esters of trimellitic acid | Hans R. Kricheldorf, Ralf Pakull | 1986-12-23 |
| 4614789 | Thermotropic aromatic polyesters with high rigidity, a process for the production thereof and the use thereof for the production of mouldings, filaments, fibres and films | Hermann Kauth | 1986-09-30 |
| 4603190 | Thermotropic aromatic polyesters having high rigidity and toughness, process for the production thereof and the use thereof for the production of moulded articles, filaments, fibres and films | Manfred Schmidt, Dieter Freitag, Aziz El-Sayed | 1986-07-29 |
| 4600764 | Thermotropic aromatic polyesters with good rigidity and toughness, process for the production thereof and the use thereof for the production of mouldings, filaments fibres and films | Ludwig Bottenbruch, Dieter Freitag, Aziz E. Sayed | 1986-07-15 |