Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673782 | Process and apparatus for microwave melting solidified gel masses, in particular of photographic emulsions | Hans Frenken, Josef Friedsam | 1987-06-16 |
| 4585561 | Flotation process for the continuous recovery of silver or silver compounds from solutions or dispersions | Marko Zlokarnik, Georg Schindler, Werner Stracke | 1986-04-29 |
| 4572849 | Process for the multiple coating of moving webs | Hans Frenken, Heinrich Bussmann, Kurt Browatzki | 1986-02-25 |
| 4569863 | Process for the multiple coating of moving objects or webs | Hans Frenken, Heinrich Bussmann, Kurt Browatzki | 1986-02-11 |
| 4451497 | Process for the pretreatment of photographic substrates | Friedrich Dolezalek, Ulrich Rendelmann | 1984-05-29 |
| 4426757 | Web guide roller for use at high speeds and process for producing the same | Roland Hourticolon, Gerhard Roth, Hans Frenken, Helmut Schaffer | 1984-01-24 |
| 4384015 | Process and an apparatus for simultaneously coating several layers to moving objects, particularly webs | Hans Frenken, Heinrich Bussmann, Kurt Browatzki | 1983-05-17 |
| 4379836 | Process for the production of dispersions and photographic materials | Hildegard Schnoring, Karl-Wilhelm Schranz | 1983-04-12 |
| 4378425 | Process for the production of dispersions and photographic materials | Hildegard Schnoring, Karl-Wilhelm Schranz | 1983-03-29 |
| 4341642 | Process and an apparatus for continuously filtering liquids | Hans Frenken, Josef Friedsam | 1982-07-27 |
| 4288469 | Anodized aluminium rollers with improved electrical conductivity and a process for their manufacture | Rudolf Meyer, Roland Hourticolon | 1981-09-08 |