Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456762 | Process for the preparation of 4,7-dichloro-3-hydroxy-thionaphthene | Manfred Urban | 1984-06-26 |
| 4431806 | Process for the preparation of pigments of the perylene-3,4,9,10-tetracarboxylic acid diimide series, and their use | Manfred Urban | 1984-02-14 |
| 4284789 | Thio-indigo dyestuffs | Manfred Urban | 1981-08-18 |
| 4253839 | Process for the fine distribution of pigments of the dioxazine series | Manfred Urban, Erich Paulus | 1981-03-03 |
| 4229583 | Process for preparing thio-indigo dyestuffs | Manfred Urban | 1980-10-21 |
| 4224222 | Process for preparing copper phthalocyanine pigments of the .alpha.-modification | Siegfried Schiessler, Wolfgang Tronich | 1980-09-23 |
| 4212975 | Process for the manufacture of the gamma-crystal modification of linear trans-quinacridone | Adolf Kroh, Otto Fuchs | 1980-07-15 |