Issued Patents All Time
Showing 1–25 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6387345 | Process for working up reaction gases during the oxidation HCI to chlorine | Fritz Gestermann, Jürgen Schneider, Hans-Ulrich Dummersdorf, Helmut Harle, Franz-Rudolf Minz | 2002-05-14 |
| 5900510 | Process for the preparation of diaminodipropyl ethers and hydroxyaminodipropyl ethers | Klaus Nachtkamp, Josef Pedain, Anatoly Bazanov, Alexandre Timofeev, Natalja Zubritskaya +1 more | 1999-05-04 |
| 5820827 | Method and device for delivering hot, aggressive media | Hans-Ulrich Dummersdorf, Helmut Harle, Franz-Rudolf Minz, Fritz Gestermann | 1998-10-13 |
| 5801285 | Process for the preparation of 2-methyl-2,4-diaminopentane | Jurgen Dahmer, Anatoly Bazanov, Alexandre Timofeev, Natalja Zubritskaya, Gennady Terechtchenko | 1998-09-01 |
| 5789620 | Process for the preparation of 1,4-bis(aminomethyl) cyclohexane | Jurgen Dahmer, Klaus Nachtkamp, Anatoly Bazanov, Alexandre Timofeev, Natalja Zubritskaya +1 more | 1998-08-04 |
| 5660810 | Method and device for delivering hot, aggressive media | Hans-Ulrich Dummersdorf, Helmut Harle, Franz-Rudolf Minz, Fritz Gestermann | 1997-08-26 |
| 5599965 | Process for the preparation of dialky carbonates | Zoltan Kricsfalussy, Hans-Joachim Traenckner | 1997-02-04 |
| 5583252 | Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid and its salts | Reinhard Schom acker, Hans-Joachim Traenckner | 1996-12-10 |
| 5552549 | Process for the dechlorination of chlorinated aromatic compounds | Christian Rasp, Hans-Joachim Traenckner | 1996-09-03 |
| 5523452 | Process for preparing dimethyl carbonate | Zoltan Kricsfalussy, Heinrich Steude, Kaspar Hallenberger, Wolfram Wagner, Hans-Joachim Traenckner | 1996-06-04 |
| 5504260 | Catalytic oxidation | Zoltan Kricsfalussy, Hans-Joachim Traenckner | 1996-04-02 |
| 5434310 | Process for the preparation of acylbenzenes | Manfred Hajek, Otto Immel, Lothar Puppe, Rudolf Braden | 1995-07-18 |
| 5386060 | Palladium catalyst and its use in the preparation of a mixture of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine | Otto Immel, Gerhard Darsow, Gerd-Michael Petruck | 1995-01-31 |
| 5369947 | Process for converting plastic waste into power | Hans-Ulrich Dummersdorf | 1994-12-06 |
| 5322965 | Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using a supported noble metal catalyst | Otto Immel, Gerhard Darsow, Gerd-Michael Petruck | 1994-06-21 |
| 5304525 | Catalyst for the preparation of aniline | Otto Immel, Rudolf Braden, Christian Frohlich, Gerhard Friedhofen, Wilfried Niemeier | 1994-04-19 |
| 5276213 | Special dihydroxydiphenyl bicycloalkanes, their production and their use for the production of high molecular weight polycarbonates | Volker Serini, Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser | 1994-01-04 |
| 5245082 | Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer | Otto Immel, Gerhard Darsow, Rudolf Braden, Hans-Helmut Schwarz | 1993-09-14 |
| 5233072 | Process for the preparation of dialkyl carbonates | Zoltan Kricsfalussy, Hans-Joachim Traenckner, Marko Zlokarnik, Reinhard Schomacker | 1993-08-03 |
| 5212280 | Polycarbonate from special dihydroxydiphenyl bicycloalkane | Volker Serini, Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser | 1993-05-18 |
| 5210328 | Process for the preparation of substituted cycloalkylidene bisphenols | Dieter Freitag, Claus Wulff, Alfred Eitel, Uwe Westeppe, Manfred Hajek +3 more | 1993-05-11 |
| 5196592 | Process for the preparation of diphenylamines | Otto Immel, Reinhard Langer, Gerhard Darsow, Hans-Josef Buysch | 1993-03-23 |
| 5166440 | Process for the preparation of n-alkylated aromatic amines | Otto Immel, Rudolf Braden | 1992-11-24 |
| 4745176 | Catalytic process for preparing polycumylene from .alpha.-cumyl halide | Robert Becker, Ludwig Bottenbruch, Johann Grolig | 1988-05-17 |
| 4714689 | Process for the regeneration of catalysts for the gas-phase reduction of aromatic nitro compounds | Gunter Stammann, Zoltan Kricsfalussy, Joachim Schneider, Harald Medem | 1987-12-22 |