Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4920205 | Process for making azo pigments | Hartmut Behringer | 1990-04-24 |
| 4920206 | Process for making azo pigments | Hartmut Behringer | 1990-04-24 |
| 4454067 | Continuous production of azo pigments | Hartmut Behringer, Kurt Karrenbauer | 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, Hartmut Behringer | 1984-03-27 |