Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5531075 | Process to transport acetylene | Siegfried Pottkamper, Hans-Werner Stephan, Gerrit Marcks | 1996-07-02 |
| 4920205 | Process for making azo pigments | Heinrich Rehberg | 1990-04-24 |
| 4920206 | Process for making azo pigments | Heinrich Rehberg | 1990-04-24 |
| 4454067 | Continuous production of azo pigments | Kurt Karrenbauer, Heinrich Rehberg | 1984-06-12 |
| 4439361 | Process for controlling diazotization reactions involving nitrous reactant by testing the air above the reaction batch for its content of nitrous gases and feeding nitrous reactant in accordance with said content | Kurt Karrenbauer, Heinrich Rehberg | 1984-03-27 |
| 4268437 | Continuous diazotization of amines | Kurt Karrenbauer | 1981-05-19 |