Issued Patents All Time
Showing 26–50 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5879855 | Compositions for making structured color images and application thereof | Ulrich Schadeli, John S. Zambounis, Zhimin Hao | 1999-03-09 |
| 5874580 | Fluorescent perylene pigments | Zhimin Hao, John S. Zambounis | 1999-02-23 |
| 5847156 | Polymerizable diketopyrrolopyrroles and polymers prepared therewith | Sameer H. Eldin | 1998-12-08 |
| 5811543 | Fluorescent carbamate-modified phthalocyanine pigments | Zhimin Hao, John S. Zambounis | 1998-09-22 |
| 5808094 | Preparation of mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles | Jin Mizuguchi, Zhimin Hao, Olof Wallquist | 1998-09-15 |
| 5780627 | Fluorescent dioxazine pigments | Zhimin Hao, John S. Zambounis | 1998-07-14 |
| 5755875 | Fluorescent chromophores containing cyanimino groups | John S. Zambounis, Zhimin Hao | 1998-05-26 |
| 5756746 | Monophase solid solutions containing asymmetric pyrrolo 4,3-c! pyrroles as hosts | Zhimin Hao | 1998-05-26 |
| 5750723 | Polymerizable diketopyrrolopyrroles and polymers prepared therewith | Sameer H. Eldin, Zhimin Hao, Bernd Lamatsch | 1998-05-12 |
| 5723626 | Fluorescent isoindoline pigments | Zhimin Hao, John S. Zambounis | 1998-03-03 |
| 5718998 | Electrophotographic photoreceptor the photosensitive layer of which contains the charge generating material a fine organic pigment prepared from a soluble pigment precursor | Ryuichi Takahashi, Kazuyo Yamamoto, Zhimin Hao | 1998-02-17 |
| 5708188 | Mixed crystals and solid solution of 1,4-diketopyrrolopyrroles | Zhimin Hao, Bernhard Medinger, Olof Wallquist | 1998-01-13 |
| 5693824 | Preparation of mixed crystals and solid solutions of 1, 4-diketo-pyrrolpyrroles | Jin Mizuguchi, Zhimin Hao, Olof Wallquist | 1997-12-02 |
| 5650520 | Crystal modification of a diketopyrrolopyrrole pigment | Zhimin Hao, Ingo Schloder | 1997-07-22 |
| 5646299 | Two new crystal modifications of a diketopyrrolopyrrole pigment | Zhimin Hao, Fritz Herren | 1997-07-08 |
| 5616725 | Pyrrolo[3,4-C]pyrrole synthesis | John S. Zambounis, Zhimin Hao | 1997-04-01 |
| 5591865 | Crystal modification of a diketopyrrolopyrrole pigment | Zhimin Hao, Fritz Herren | 1997-01-07 |
| 5561232 | Fluorescent quinacridone pigments | Zhimin Hao, John S. Zambounis | 1996-10-01 |
| 5527922 | Pyrrolo[3,4-c]pyrroles containing cyanimino groups | John S. Zambounis, Zhimin Hao | 1996-06-18 |
| 5502196 | Pyrrolo 3,4-c!pyrroles containing amine oxide groups | Zhimin Hao, Rudolf Kirchmayr | 1996-03-26 |
| 5484943 | Pyrrolo[3,4-c]pyrroles | John S. Zambounis, Zhimin Hao | 1996-01-16 |
| 5282897 | Process for improving storage stability of pigments | Phillipe Bugnon, Iain Frank Fraser, Wern T. Tsai | 1994-02-01 |
| 5271769 | Method of improving storage stability of pigments | Philippe Bugnon, Alison MacLennan, Iain Frank Fraser | 1993-12-21 |
| 5017706 | Monoketopyrrolopyrroles | Alain C. Rochat, Olof Wallquist | 1991-05-21 |
| 4931566 | Process for the preparation of pyrrolo[3,4-c]pyrroles | Werner Surber, Christian R. Stern | 1990-06-05 |