Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6099818 | Carbon blacks and process for producing them | Burkhard Freund, Ulrich Sattler, Karl Vogel | 2000-08-08 |
| 4636375 | Process for producing furnace blacks of variable carbon black structure | Lothar Rothbuhr | 1987-01-13 |
| 4442163 | Resorcinol-filler preparation, process for the production and use of the same | Siegfried Wolff, Lothar Rothbuhr | 1984-04-10 |
| 4439401 | Process and apparatus for the production of carbon black | Manfred Voll, Lothar Rothbuhr | 1984-03-27 |
| 4435378 | Process for removing extractable substances from carbon black | Reinhold Reck, Manfred Voll, Peter Kleinschmit | 1984-03-06 |
| 4430280 | Process for the production of mixed granulate from carbon black and light filler | Alfons Kreher, Lothar Rothbuhr, Gunter Turk, Siegfried Wolff | 1984-02-07 |
| 4381949 | Resorcinol-filler preparation, process for the production and use of the same | Siegfried Wolff, Lothar Rothbuhr | 1983-05-03 |
| 4366138 | Carbon black useful for pigment for black lacquers | Edith Eisenmenger, Richard Engel, Reinhold Reck, Hans Schaefer, Manfred Voll | 1982-12-28 |
| 4366139 | Process for the production of water containing carbon black preparations | Wilhelm Berndt, Lothar Rothbuhr, Hans Wagner | 1982-12-28 |
| 4221772 | Carbon black for lacquers and pigments | Edith Eisenmenger, Lothar Rothbuhr, Hans Schafer | 1980-09-09 |