Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5120849 | Preparation of O-substituted hydroxylamines | Jochen Wild, Norbert Goetz, Wolfgang Will, Peter Plath | 1992-06-09 |
| 5032495 | Tetraazaporphyrins and optical recording medium | Bernhard Albert, Peter Neumann | 1991-07-16 |
| 4957608 | Preparation of 8-bromomethyl-3-methylquinoline compounds | Helmut Hagen, Jacques Dupuis | 1990-09-18 |
| 4857103 | Influencing the development of crops with 7-chloroquinoline-8-carboxylic acids | Henning Rosebrock, Johann Jung, Wilhelm Rademacher, Max Luib, Volker Fischer +3 more | 1989-08-15 |
| 4845226 | Preparation of 8-bromomethyl-3-methylquinoline compounds | Helmut Hagen, Jacques Dupuis | 1989-07-04 |
| 4832731 | Quinoline-8-carboxylic acid azolides and their use as herbicides | Peter Plath, Karl Eicken, Helmut Hagen, Juergen Markert, Norbert Meyer +1 more | 1989-05-23 |
| 4808212 | Oxime esters of substituted quinoline-8-carboxylic acids and use thereof as herbicides | Peter Plath, Karl Eicken, Bernd Zeeh, Ulrich Eichenauer, Helmut Hagen +2 more | 1989-02-28 |
| 4804404 | 2 and/or 3-trifluoromethyl-substituted quinoline 8-carboxylic acid derivatives and their use for controlling undesirable plant growth | Helmut Hagen, Ulrich Eichenauer, Peter Plath, Thomas Liese-Sauer, Karl Eicken +2 more | 1989-02-14 |
| 4717416 | 3,7-dichloro-8-quinoline derivatives, and their use for controlling undersirable plant growth | Helmut Hagen, Juergen Markert, Bruno Wuerzer | 1988-01-05 |
| 4715889 | Quinoline derivatives and their use for controlling undesirable plant growth | Helmut Hagen, Jurgen Markert, Bruno Wuerzer | 1987-12-29 |
| 4699983 | 2-amino-4-trichloromethylpyridine and its preparation | Helmut Hagen, Hans Ziegler, Ernst-Heinrich Pommer, Jurgen Dressel | 1987-10-13 |
| 4667035 | Substituted triazanonanes and process for their preparation | Helmut Hagen | 1987-05-19 |
| 4550208 | Preparation of 4,4'-diaminobenzophenones | Walter Disteldorf, Wolfgang Eisfeld | 1985-10-29 |
| 4544755 | Cleavage of phthalimides to amines | Helmut Hagen | 1985-10-01 |
| 4511393 | 3-Chloro-8-cyanoquinolines and their use for controlling undesirable plant growth | Helmut Hagen, Juergen Markert, Bruno Wuerzer | 1985-04-16 |
| 4277477 | Method of using 1,2-benzisothiazoles | Helmut Hagen, Juergen Markert | 1981-07-07 |
| 4267349 | Process for the preparation of 2-substituted-alkyl-1-alkyl-nitroimidazoles | Helmut Hagen | 1981-05-12 |
| 4232165 | 2-Substituted-1-alkyl-nitroimidazoles | Helmut Hagen | 1980-11-04 |