Issued Patents All Time
Showing 26–50 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5032687 | Process for the preparation of cyclopropylamine | Herbert Diehl, Edwin Ritzer | 1991-07-16 |
| 5030747 | Process for the preparation of .mu.-amino-acrylic acid esters | Erich Wolters, Friedrich-Wilhelm Ullrich, Halmut Kraus, Gerhard Marzolph, Gunter Silber | 1991-07-09 |
| 4990686 | Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane | Gunter Rauchschwalbe, Volkmar Handschuh | 1991-02-05 |
| 4980479 | Preparation of novel 5-acyloxy-4 (5H)-oxazolonium salts suited for use as intermediates for triazinone herbicides | Gerhard Bonse, Gerhard Marzolph | 1990-12-25 |
| 4973758 | Process for the preparation of 1,5-dihydroxynaphthalene and 1,5-diaminonaphthalene | Horst Behre, Lothar Jakob, Dietmar Mayer, Roland Busse | 1990-11-27 |
| 4968835 | Process for the preparation of aminoaryl-sulphonic acids | Herbert Emde, Peter Schnegg | 1990-11-06 |
| 4910345 | Process for the purification of nitrobenzaldenhyde | Willi Streicher | 1990-03-20 |
| 4880576 | Acid halides, a process for their preparation | Norbert Langenfeld, Wolfgang Heydkamp | 1989-11-14 |
| 4874892 | Process for the preparation of 6-hydroxynaphthalene-1-carboxylic from 1-aminomethylnaphthalene-6-sulphonic acid | Erich Hammerschmidt | 1989-10-17 |
| 4873026 | Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid | Horst Behre, Gerhard Marzolph, Willi Streicher | 1989-10-10 |
| 4868347 | Process for obtaining substituted fluorobenzenes | Edwin Ritzer | 1989-09-19 |
| 4863642 | Process for preparing acid halides | Erich Wolters | 1989-09-05 |
| 4836959 | Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid | Willi Streicher, Gerhard Marzolph, Horst Behre | 1989-06-06 |
| 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, Hans-Rudolf Dicke, Erich Hammerschmidt, Ludwig Bottenbruch, Frank Kleiner | 1989-05-30 |
| 4814483 | Process for the preparation of optionally substituted 2-benzyl-toluenes | Gunter Silber | 1989-03-21 |
| 4795596 | 1-Aminomethylnaphthalene-6-sulphonic acid, its preparation and its use | Erich Hammerschmidt | 1989-01-03 |
| 4769454 | Process for the preparation of N-methylol-caprolactam | Wolfgang Bauer | 1988-09-06 |
| 4760209 | Process for preparing 3,5-dichloro-.alpha.-methylstyrene | Erich Wolters, Bernhard Beitzke, Karlfried Wedemeyer, Michael Herzhoff, Karl-Wilhelm Henneke +2 more | 1988-07-26 |
| 4739104 | Process for the preparation of pivaloylpyruvic acid esters | Friedrich Werner | 1988-04-19 |
| 4717514 | Process for preparing p-toluidine-2-sulphonic acid | Herbert Emde, Rolf Schimpf | 1988-01-05 |
| 4705652 | Tetra-alkali metal salts of chromotropic acid, a process for their isolation and their use | Erich Hammerschmidt, Horst Behre, Dietmar Mayer | 1987-11-10 |
| 4668788 | 5,5-dichloro-4,5-dihydro-6-hydroxy-2-trichloromethylpyrimidin-4-one | Bernhard Beitzke | 1987-05-26 |
| 4666935 | Substituted maleimides and their use as fungicides for plant-pathogenic fungi | Gerhard Marzolph, Paul Reinecke, Wilhelm Brandes, Gerd Hanssler | 1987-05-19 |
| 4661621 | Process for the preparation of pivaloylacetic acid esters | Friedrich Werner | 1987-04-28 |
| 4622429 | Process for the preparation of substituted benzaldehydes | Erich Wolters, Otto Neuner | 1986-11-11 |