Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679826 | Process for the preparation of 2-chloroacrylonitrile | Franz-Josef Mais, Thomas Essert, Helmut Fiege, Friedrich Durholz | 1997-10-21 |
| 5677453 | Process for the preparation of 4,6-dichloropyrimidines | Gunther Cramm, Volker Kass | 1997-10-14 |
| 5464875 | Process for preparing weakly-basic anion exchangers and reagents suitable for this purpose | Reinhold Klipper, Stefan Antons, Alfred Mitschker, Werner Struver, Holger Lutjens | 1995-11-07 |
| 5283338 | Process for the preparation of 2-chloropyridines | Gunther Cramm, Hans Lindel | 1994-02-01 |
| 5144065 | Process for the preparation of aminoarylsulphonic acids | — | 1992-09-01 |
| 4764621 | Preparation of 2-chlorobenzthiazole | — | 1988-08-16 |
| 4760209 | Process for preparing 3,5-dichloro-.alpha.-methylstyrene | Heinz U. Blank, Erich Wolters, Bernhard Beitzke, Karlfried Wedemeyer, Michael Herzhoff +2 more | 1988-07-26 |
| 4600542 | Sulphonation products of naphthalene, processes for their preparation, and their use | Otto Lindner, Heinrich Pelster, Arnd Stuwe | 1986-07-15 |
| 4348334 | Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid) | Bernhard Albrecht, Hans-Helmut Frey, Vinzenz Habermacher, Horst Behre, Lutz Kienitz +2 more | 1982-09-07 |
| 4341720 | Process for the preparation of oxalyl chloride | Axel Vogel, Karl Mannes, Viktor Trescher | 1982-07-27 |
| 4325889 | Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) | Horst Behre, Albert Hullen, Bruno Kruger | 1982-04-20 |
| 4267346 | Process for the preparation of 1,2,4-triazole | Reinhard Kaiser | 1981-05-12 |
| 4217209 | Process for removing heavy metal sulphides from aqueous systems | Ernst Borgmann, Peter A. Buchel, deceased, Wolfgang Harms | 1980-08-12 |