Issued Patents 1994
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368641 | Modified 2,9-dimethylquinacridone pigments, process for their manufacture and a method for pigmenting or lacquer systems with these pigments | Adolf Kroh | 1994-11-29 |
| 5342723 | Biscationic acid amide and acid imide derivatives as charge controllers | Hans-Tobias Macholdt, Siegfried Schiebler, Jorg Gitzel | 1994-08-30 |
| 5329046 | Biscationic acid amide and imide derivatives and processes for their preparation | Hans-Tobias Macholdt, Siegfried Schiessler, Jorg Gitzel | 1994-07-12 |
| 5318627 | Process for the preparation of pigment preparations based on C.I. pigment violet 23 | Manfred Urban | 1994-06-07 |
| 5296034 | Process for the production of copper phthalocyanine pigment preparations of the .alpha. phase | Manfred Urban | 1994-03-22 |
| 5296033 | Process for the production of pigment preparations based on phythalocyanine pigments | Manfred Urban | 1994-03-22 |
| 5275653 | Pigment preparations based on dioxazine compounds | Manfred Urban | 1994-01-04 |