Issued Patents All Time
Showing 26–50 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5591258 | Preparation of linear, unsubstituted quinacridone pigments of the .beta.-phase | Manfred Urban | 1997-01-07 |
| 5510494 | Process for the preparation of C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy and unsubstituted 2-(cyanomethyl)benzimidazole | Gustav Kapaun | 1996-04-23 |
| 5466807 | Perylene compounds containing sulfonic acid groups process for preparing them and their use | Manfred Urban | 1995-11-14 |
| 5415669 | Dye mixtures for the dyeing of textile hydrophobic fibre materials | Ulrich Buhler, Hubert Kruse | 1995-05-16 |
| 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 |
| 5264034 | Pigment preparations based on perylene compounds | Manfred Urban | 1993-11-23 |
| 5264032 | Pigment preparations | Manfred Urban | 1993-11-23 |
| 5254796 | Oxidation process | Siegfried Schiebler | 1993-10-19 |
| 5248774 | Inner salts based on ammonium and sulfonate groups of perylene-3,4,9,10-tetracarboxylic and derivatives thereof | Manfred Urban | 1993-09-28 |
| 5240499 | Surfactant triazine compounds and their use | Rainer Az, Wolfgang Schwab, Dieter Schnaitmann | 1993-08-31 |
| 5207829 | Pigment preparations | Wolfgang Schwab | 1993-05-04 |
| 5137576 | Quinacridones having selectively adjusted triboelectric effects | Hans-Tobias Macholdt, Adolf Kroh, Alexander Sieber | 1992-08-11 |
| 5123966 | Mixed crystal pigments based on halogenated perylenetetracarboximides | Manfred Urban | 1992-06-23 |
| 5112404 | Pigment formulations, processes for their preparation and their use | Andreas Sommer, Manfred Urban | 1992-05-12 |
| 5110931 | Process for the preparation of N,N'-dimethylperylene-3,4,9,10-tetracarboxylic diimide in high-hiding pigment form | Manfred Urban | 1992-05-05 |
| 5074919 | Preparation of vat dyes and pigments of the perinone series | Gustav Kapaun, Siegfried Schiessler | 1991-12-24 |
| 5071483 | Process for the preparation of pigment preparations of the anthanthrone series | Manfred Urban, Siegfried Schiessler | 1991-12-10 |
| 5071482 | Pigment preparations | Siegfried Schiessler, Manfred Urban | 1991-12-10 |
| 5070159 | Addition compounds, a process for the preparation, and their use, based on epoxy novolac-fatty amine adducts | Andreas Sommer, Adolf Kroh, Jurgen Hohn, Otmar Hafner, Wolfgang Rieper | 1991-12-03 |