Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6013777 | Process for the preparation of fluorescent pigments | John S. Zambounis, Abul Iqbal | 2000-01-11 |
| 5969154 | Liquid crystalline diketopyrrolopyrroles | Abul Iqbal, Nancy Tebaldi, Klaus Praefcke | 1999-10-19 |
| 5886160 | Fluorescent pigments | John S. Zambounis, Abul Iqbal | 1999-03-23 |
| 5879855 | Compositions for making structured color images and application thereof | Ulrich Schadeli, John S. Zambounis, Abul Iqbal | 1999-03-09 |
| 5874580 | Fluorescent perylene pigments | John S. Zambounis, Abul Iqbal | 1999-02-23 |
| 5821373 | Solid sloutions of 1,4-diketopyrrolopyrroles | Olof Wallquist | 1998-10-13 |
| 5811543 | Fluorescent carbamate-modified phthalocyanine pigments | John S. Zambounis, Abul Iqbal | 1998-09-22 |
| 5808094 | Preparation of mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles | Jin Mizuguchi, Olof Wallquist, Abul Iqbal | 1998-09-15 |
| 5780627 | Fluorescent dioxazine pigments | John S. Zambounis, Abul Iqbal | 1998-07-14 |
| 5755875 | Fluorescent chromophores containing cyanimino groups | John S. Zambounis, Abul Iqbal | 1998-05-26 |
| 5756746 | Monophase solid solutions containing asymmetric pyrrolo 4,3-c! pyrroles as hosts | Abul Iqbal | 1998-05-26 |
| 5750723 | Polymerizable diketopyrrolopyrroles and polymers prepared therewith | Sameer H. Eldin, Abul Iqbal, Bernd Lamatsch | 1998-05-12 |
| 5723626 | Fluorescent isoindoline pigments | John S. Zambounis, Abul Iqbal | 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, Abul Iqbal | 1998-02-17 |
| 5708188 | Mixed crystals and solid solution of 1,4-diketopyrrolopyrroles | Abul Iqbal, Bernhard Medinger, Olof Wallquist | 1998-01-13 |
| 5693824 | Preparation of mixed crystals and solid solutions of 1, 4-diketo-pyrrolpyrroles | Jin Mizuguchi, Olof Wallquist, Abul Iqbal | 1997-12-02 |
| 5650520 | Crystal modification of a diketopyrrolopyrrole pigment | Ingo Schloder, Abul Iqbal | 1997-07-22 |
| 5646299 | Two new crystal modifications of a diketopyrrolopyrrole pigment | Abul Iqbal, Fritz Herren | 1997-07-08 |
| 5616725 | Pyrrolo[3,4-C]pyrrole synthesis | John S. Zambounis, Abul Iqbal | 1997-04-01 |
| 5591865 | Crystal modification of a diketopyrrolopyrrole pigment | Abul Iqbal, Fritz Herren | 1997-01-07 |
| 5561232 | Fluorescent quinacridone pigments | John S. Zambounis, Abul Iqbal | 1996-10-01 |
| 5527922 | Pyrrolo[3,4-c]pyrroles containing cyanimino groups | John S. Zambounis, Abul Iqbal | 1996-06-18 |
| 5518539 | Process for the preparation of synergistic pigment mixtures | Abul Igbal, John S. Zambounis, Bernhard Medinger | 1996-05-21 |
| 5502196 | Pyrrolo 3,4-c!pyrroles containing amine oxide groups | Abul Iqbal, Rudolf Kirchmayr | 1996-03-26 |
| 5484943 | Pyrrolo[3,4-c]pyrroles | John S. Zambounis, Abul Iqbal | 1996-01-16 |