Issued Patents 1997
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 5602271 | Process for the preparation of aryl carbonates | Pieter Ooms, Norbert Sch on | 1997-02-11 |
| 5602284 | Process for separating off aminobiphenyl from diphenylamine | Frank Arndt, Rudolf Wiemers | 1997-02-11 |