Issued Patents All Time
Showing 26–50 of 186 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5831111 | Process for the continuous production of aryl carbonates | Pieter Ooms, Eric Bischof, Steffen Kuhling, Gottfried Zaby, Wolfgang Jakob +2 more | 1998-11-03 |
| 5824816 | Recovery of catalyst systems from diarylcarbonate-containing reaction mixtures by melt crystallization | Carsten Hesse, Johann Rechner, Hans-Peter Wirges | 1998-10-20 |
| 5821377 | Process for the continuous production of diaryl carbonates | Carsten Hesse, Johann Rechner | 1998-10-13 |
| 5808157 | Process for producing aromatic amines | Reinhard Langer, Paul Wagner, Ursula Pentling | 1998-09-15 |
| 5780690 | Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds | Klaus Berg, Gerhard Fennhoff, Ralf Pakull, Bernhard Wehrle, Alfred Eitel +2 more | 1998-07-14 |
| 5763717 | Process for preparing hydroxybiphenyl | Christine Mendoza-Frohn, Jurgen Scharschmidt, Ulrich Notheis, Rudolf J. Klee, Gerhard Darsow | 1998-06-09 |
| 5750801 | Process for the continuous preparation of benzyl alcohol | Ursula Jansen, Pieter Ooms, Erhard-Gunther Hoffmann, Bernd-Ulrich Schenke | 1998-05-12 |
| 5739258 | Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom | Gottfried Zaby, Steffen Kuhling, Carsten Hesse, Johann Rechner | 1998-04-14 |
| 5734004 | Process for the purification of carbonic acid diaryl ester | Steffen Kuhling, Kaspar Hallenberger, Pieter Ooms, Gunther Jeromin | 1998-03-31 |
| 5728897 | Process for the preparation of benzyl alcohol | Erhard-Gunther Hoffmann, Ursula Jansen, Pieter Ooms, Bernd-Ulrich Schenke | 1998-03-17 |
| 5723694 | Process for preparing monomethylated or dimethylated phenols | Artur Botta | 1998-03-03 |
| 5717127 | Process for preparing 6-oxo-(6H)-dibenz-C,E! 1,2!-oxaphosphorins | Volker Glock | 1998-02-10 |
| 5712406 | Method of extractive separation of diaryl carbonates and the original aromatic hydroxy compounds from reaction solutions | Carsten Hesse, Johann Rechner | 1998-01-27 |
| 5710310 | Process for the continuous production of diaryl carbonates | Pieter Ooms, Steffen Kuhling, Gottfried Zaby | 1998-01-20 |
| 5688891 | T,3-dioxan-2-one group-containing oligourethanes | Wieland Hovestadt, Lutz Schmalstieg, Harald Blum, Norbert Schon | 1997-11-18 |
| 5679858 | Process for the manufacture of aromatic amines by gas-phase hydrogenation and catalyst useful thereof | Reinhard Langer, Ursula Pentling | 1997-10-21 |
| 5679825 | Process for the production of aryl carbonates | Pieter Ooms | 1997-10-21 |
| 5670029 | Process for the separation of a mixture of benzyl chloride, benzyl alcohol, dibenzyl ether and aqueous hydrochloric acid | Ursula Jansen, Pieter Ooms, Erhard-Gunther Hoffmann, Bernd-Ulrich Schenke | 1997-09-23 |
| 5663408 | Process for preparing diaryl carbonates | Carsten Hesse, Johann Rechner | 1997-09-02 |
| 5652275 | Process for the chemical recycling of polycarbonates | Steffen Kuhling | 1997-07-29 |
| 5650530 | Process for preparing 6-oxo-(6H)-dibenz-[c,e][1,2]-oxaphosphorins (ODOPs) | Volker Glock, Bernd Griehsel, Joachim Komoschinski | 1997-07-22 |
| 5625097 | Process for preparing diphenylamines and catalysts usable for this purpose | Christine Mendoza-Frohn, J urgen Scharschmidt, Ulrich Notheis, Rudolf J. Klee, Gerhard Darsow | 1997-04-29 |
| 5625091 | Process for the production of diaryl carbonates | Carsten Hesse, Johann Rechner | 1997-04-29 |
| 5614616 | Process for the production of polysaccharides | Klaus Szablikowski, J orn Breckwoldt | 1997-03-25 |
| 5602284 | Process for separating off aminobiphenyl from diphenylamine | Frank Arndt, Rudolf Wiemers | 1997-02-11 |