Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5620790 | Multi-layer microfiltration membrane having an integrated prefiltration layer and method of making same | Udo Holzki, Tilo Renner | 1997-04-15 |
| 5376274 | Hydrophilic membrane and method for its production | Tilo Renner, Anneliese Kuchar | 1994-12-27 |
| 5066401 | Flat or capillary membrane based on a homogeneous mixture of polyvinylidene fluoride and a second polymer which can be rendered hydrophilic by chemical reaction | Heinz-Dieter Sluma, Gunter Eberhard, Ernst Spindler, Lothar Krauss, Helmut Volker | 1991-11-19 |
| 5030297 | Process for the manufacture of seamless pressure vessels and its named product | Dieter Vespermann, Bernhard Hoffmann, Ingo von Hagen | 1991-07-09 |
| 4968733 | Process for producing microporous powders and membranes | Friedbert Wechs | 1990-11-06 |
| 4678482 | Process for purifying hydrogen chloride gas | Elmar Lohmar, Harald Scholz | 1987-07-07 |
| 4526870 | Determination of nitrate in water and catalyst therein | — | 1985-07-02 |
| 4504410 | Organopolysiloxane anti-foaming agents | Hans-Ulrich Hempel, Margarete Grunert, Holger Tesmann | 1985-03-12 |
| 4259078 | Heat-stable quaternary ammonium compounds for fiber lubricating | Rolf Kleber | 1981-03-31 |
| 4210604 | Process for preparing secondary amines from mixtures of aliphatic alcohols and nitriles | Adolf F. Becker | 1980-07-01 |