Issued Patents All Time
Showing 51–75 of 92 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6291388 | Double metal cyanide catalysts for producing polyether polyols | Jörg Hofmann, Pramod Gupta, Walter Schafer | 2001-09-18 |
| 6204357 | Double metal cyanide catalysts for preparing poly-etherpolyols | Jörg Hofmann, Pramod Gupta, Lambertus Groenendaal | 2001-03-20 |
| 6166256 | Process for preparing (4-nitro-sophenyl)phenylhydroxylamine | Henry Giera, Carl Casser, Michael Schelhaas, Christian Laue, Michaela Meiers +1 more | 2000-12-26 |
| RE36432 | Process for the purification of polycarbonate and polyester carbonate solutions | Gerhard Fennhoff, Hans-Josef Buysch, Ralf Pakull | 1999-12-07 |
| 5998327 | Zinc/metal hexacyanocobaltate complex compounds, a process for their preparation, and their use in a process for the production of polyether polyols | Jörg Hofmann, Pramod Gupta, Harald Pielartzik, Walter Schafer | 1999-12-07 |
| 5994584 | Process for the preparation of 4-aminodiphenylamine | Henrey Giera | 1999-11-30 |
| 5932768 | Process for the preparation of 4-aminodiphenylamine | Ulrich Notheis, Christian Laue | 1999-08-03 |
| 5925791 | Process for producing 4-aminodiphenylamine | Hans-Josef Buysch, Christian Laue, Heinrich Konigshofen, Ulrich Notheis, Ursula Pentling | 1999-07-20 |
| 5900501 | Process for the continuous production of aryl carbonates | Hans-Josef Buysch, Steffen Kuhling, Gottfried Zaby | 1999-05-04 |
| 5841220 | Low-pressure mercury discharge lamp | — | 1998-11-24 |
| 5831111 | Process for the continuous production of aryl carbonates | Eric Bischof, Hans-Josef Buysch, Steffen Kuhling, Gottfried Zaby, Wolfgang Jakob +2 more | 1998-11-03 |
| 5750801 | Process for the continuous preparation of benzyl alcohol | Hans-Josef Buysch, Ursula Jansen, Erhard-Gunther Hoffmann, Bernd-Ulrich Schenke | 1998-05-12 |
| 5734004 | Process for the purification of carbonic acid diaryl ester | Steffen Kuhling, Kaspar Hallenberger, Hans-Josef Buysch, Gunther Jeromin | 1998-03-31 |
| 5728897 | Process for the preparation of benzyl alcohol | Hans-Josef Buysch, Erhard-Gunther Hoffmann, Ursula Jansen, Bernd-Ulrich Schenke | 1998-03-17 |
| 5710310 | Process for the continuous production of diaryl carbonates | Hans-Josef Buysch, Steffen Kuhling, Gottfried Zaby | 1998-01-20 |
| 5679825 | Process for the production of aryl carbonates | Hans-Josef Buysch | 1997-10-21 |
| 5670029 | Process for the separation of a mixture of benzyl chloride, benzyl alcohol, dibenzyl ether and aqueous hydrochloric acid | Hans-Josef Buysch, Ursula Jansen, Erhard-Gunther Hoffmann, Bernd-Ulrich Schenke | 1997-09-23 |
| 5630662 | Capped electric lamp | — | 1997-05-20 |
| 5602271 | Process for the preparation of aryl carbonates | Hans-Josef Buysch, Norbert Sch on | 1997-02-11 |
| 5593944 | Aminoaryl-1,3-oxazine-2,4-diones | Hans-Joachim Santel, Markus Dollinger | 1997-01-14 |
| 5580843 | Substituted 1-arylpyrazoles | J org Stetter, Bernd Alig, Stefan B ohm, Achim Bertsch, Christoph Erdelen +4 more | 1996-12-03 |
| 5557170 | Low-pressure discharge lamp and method of manufacturing a low-pressure discharge lamp | — | 1996-09-17 |
| 5554580 | N-aryl-substituted nitrogen-containing heterocycles intermediates and their use as herbicides and plant growth regulators | Reiner Fischer, Uta Jensen-Korte, Franz Kunisch, Albrecht Marhold, Otto Schallner +4 more | 1996-09-10 |
| 5527942 | Process for the production of aryl carbonates | Norbert Schon, Hans-Josef Buysch | 1996-06-18 |
| 5478961 | Process for preparting aryl carbonates | Norbert Schon, Hans-Josef Buysch | 1995-12-26 |