Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6002041 | Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthalates | Gunter Rauchschwalbe, Helmut Fiege | 1999-12-14 |
| 5922874 | Process for preparing N-aryl-N'-alkyl-piperazines | Joachim Komoschinski, Helmut Fiege | 1999-07-13 |
| 5859298 | Process for the preparation of 2-halogeno-4,5-difluorobenzoyl fluorides | Stefan Antons, Albrecht Marhold | 1999-01-12 |
| 5672708 | Process for the preparation of N-arylaminoacrylic acid derivatives and the use of N-arylaminoacrylic acid derivatives thus prepared for the preparation of 4-quinolone-3-carboxylic acid derivatives | Gunter Rauchschwalbe, Wolfgang Eymann, Helmut Fiege | 1997-09-30 |
| 5536879 | Process for preparing optically active amino alcohols | Stefan Antons | 1996-07-16 |
| 5401869 | Process for the preparation of aminomethylene compounds | Helmut Kraus, Nikolaus Muller, Gerhard Marzolph | 1995-03-28 |
| 5399773 | Process for the preparation of nitrophenyl alkyl ethers | Robert Weitz | 1995-03-21 |
| 4760209 | Process for preparing 3,5-dichloro-.alpha.-methylstyrene | Heinz U. Blank, Erich Wolters, Karlfried Wedemeyer, Michael Herzhoff, Karl-Wilhelm Henneke +2 more | 1988-07-26 |
| 4668788 | 5,5-dichloro-4,5-dihydro-6-hydroxy-2-trichloromethylpyrimidin-4-one | Heinz U. Blank | 1987-05-26 |
| 4618698 | Process for the preparation of a mixture of an optionally substituted cinnamic acid ester and an optionally substituted .beta.-alkoxy-.beta.-phenyl-propionic acid ester, and a process for the preparation of optionally substituted cinnamic acid | — | 1986-10-21 |
| 4613692 | Process for the preparation of cinnamic acids which are optionally substituted in the nucleus | Volkmar Handschuh, Heinz U. Blank | 1986-09-23 |