Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4636375 | Process for producing furnace blacks of variable carbon black structure | Gerhard Kuhner | 1987-01-13 |
| 4442163 | Resorcinol-filler preparation, process for the production and use of the same | Gerhard Kuhner, Siegfried Wolff | 1984-04-10 |
| 4439401 | Process and apparatus for the production of carbon black | Manfred Voll, Gerhard Kuhner | 1984-03-27 |
| 4435377 | Oxidative after-treatment of carbon black | — | 1984-03-06 |
| 4430280 | Process for the production of mixed granulate from carbon black and light filler | Alfons Kreher, Gerhard Kuhner, Gunter Turk, Siegfried Wolff | 1984-02-07 |
| 4381949 | Resorcinol-filler preparation, process for the production and use of the same | Gerhard Kuhner, Siegfried Wolff | 1983-05-03 |
| 4366139 | Process for the production of water containing carbon black preparations | Gerhard Kuhner, Wilhelm Berndt, Hans Wagner | 1982-12-28 |
| 4297145 | Silane/filler preparations, process for their production and their use | Siegfried Wolff, Heinz Grewatta | 1981-10-27 |
| 4292291 | Process for the production of furnace black | Josef Witte | 1981-09-29 |
| 4282198 | Process for the production of high quality carbon black | Werner Sroka, Walter Fritz | 1981-08-04 |
| 4238199 | Process for the control of the ratio DBP number/DBP number after pressing in the manufacture of carbon black pellets | Werner Sroka, Karl Vogel | 1980-12-09 |
| 4228131 | Apparatus for the production of carbon black | Manfred Voll | 1980-10-14 |
| 4225416 | Process for the production of high quality carbon black forming material | Werner Sroka, Walter Fritz | 1980-09-30 |
| 4221772 | Carbon black for lacquers and pigments | Edith Eisenmenger, Gerhard Kuhner, Hans Schafer | 1980-09-09 |
| 4197221 | Carbon black concentrate | Edith Eisenmenger, Lutz Dworowy, Gunther Fuchs, Hans Schafer | 1980-04-08 |
| 4195068 | Process for the production of furnace black | Gehard Kuhner, Gunther Dittrich | 1980-03-25 |