Issued Patents All Time
Showing 51–67 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5366597 | Process for the preparation of perfluorobutylsulphonyl fluoride | Andreas Bulan | 1994-11-22 |
| 5364507 | Process for the production of perfluoroalkylsulphonyl fluorides and electrodes for performance of the process | Andreas Bulan, Zbigniew Muziol, Hartmut Schlecker, Hans-Heinrich Moretto | 1994-11-15 |
| 5342986 | Fluorinated carboxylic acid esters of phosphonocarboxylic acids and phosphinocarboxylic acids and use thereof | Klaus Pohmer, Hans-Dieter Block, Cornelia Dorzhach-Lange, Hans-Heinrich Moretto | 1994-08-30 |
| 5326437 | Process for production of perfluoroalkysulphonyl fluorides | Andreas Bulan, Peter Hafermann, Michael Krancher | 1994-07-05 |
| 5273735 | Process for the preparation of sodium dichromate | Bernd Rosenow, Hans-Dieter Block, Norbert Lonhoff | 1993-12-28 |
| 5250274 | Process for the production of sodium dichromate | Norbert Lonhoff, Bernhard Spreckelmeyer, Hans-Dieter Block, Jost Halstenberg, Bernd Rosenow | 1993-10-05 |
| 5181994 | Process for the preparation of chromic acid | Norbert Lonhoff, Ludwig Schmidt, Hans-Dieter Block | 1993-01-26 |
| 5127999 | Process for the preparation of alkali metal dichromates and chromic acid by electrolysis | Helmut Klotz, Norbert Lonhoff, Hans-Dieter Block, Hans-Dieter Pinter | 1992-07-07 |
| 5128000 | Dimensionally stable anodes and their use in the preparation of alkali metal dichromates and chromic acid | Helmut Klotz, Norbert Lonhoff, Hans-Dieter Block | 1992-07-07 |
| 5096547 | Preparation of chromic acid using bipolar membranes | Helmut Klotz, Wolfgang Ohlendorf | 1992-03-17 |
| 5096548 | Process for the preparation of chromic acid | Norbert Lonhoff, Ludwig Schmidt, Hans-Dieter Block | 1992-03-17 |
| 5094729 | Processes for the preparation of alkali metal dichromates and chromic acid | Helmut Klotz, Hans-Dieter Pinter, Hans-Dieter Block, Norbert Lonhoff | 1992-03-10 |
| 5071522 | Process for the preparation of chromic acid | Helmut Klotz, Hans-Dieter Pinter, Hans-Dieter Block, Norbert Lonhoff | 1991-12-10 |
| 5068015 | Electrochemical process for the production of chromic acid | Hans-Dieter Block, Norbert Lonhoff, Bernd Makowka, Helmut Klotz, Bernhard Spreckelmeyer | 1991-11-26 |
| 5051155 | Processes for the preparation of alkali metal dichromates and chromic acid | Helmut Klotz, Hans-Dieter Pinter, Hans-Dieter Block, Norbert Lonhoff | 1991-09-24 |
| 5022830 | Submerged fuel pump | Johann Attenni | 1991-06-11 |
| 4981573 | Process for the production of alkali dichromates and chromic acid employing an anode of valve metal activated by electrodepositing noble metals from melts | Helmut Klotz, Hans-Dieter Block, Norbert Lonhoff | 1991-01-01 |