Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6576768 | Preparation of alkylthio- and/or arylthio-substituted diketo-diaryl-pyrrolopyrroles | Zhimin Hao, Nancy Schlöder-Tebaldi | 2003-06-10 |
| 5973146 | Process for the preparation of aminated diketobis (aryl or heteroaryl)pyrrolopyrroles and the use thereof as photoconductive substances | Olof Wallquist, Abul Iqbal, Jin Mizuguchi | 1999-10-26 |
| 5472815 | Process for storing information and a material having information written thereon | Jin Mizuguchi, Gerald Giller | 1995-12-05 |
| 5352551 | Process for storing information with high storage density | Jin Mizuguchi, Gerald Giller | 1994-10-04 |
| 5316852 | Coated material and the use thereof | Jin Mizuguchi, Gerald Giller | 1994-05-31 |
| 5298063 | Novel electrochromic compositions based on diketopyrrolopyrroles | Jin Mizuguchi | 1994-03-29 |
| 5169953 | Electrochromic compositions based on diketopyrrolopyrroles | Jin Mizuguchi | 1992-12-08 |
| 5144333 | Process for the storage of information in an organic recording layer | Jin Mizuguchi | 1992-09-01 |
| 5017706 | Monoketopyrrolopyrroles | Abul Iqbal, Olof Wallquist | 1991-05-21 |
| 4914211 | Pigment compositions | Max Jost, Abul Iqbal | 1990-04-03 |
| 4810802 | Process for the preparation of brominated pyrrolo-[3,4-c]-pyrroles and mixtures thereof | Olof Wallquist, Abul Iqbal, Johannes Pfenninger | 1989-03-07 |
| 4791204 | 1,4-diketopyrrolo[3,4-c]pyrrole pigments | Max Jost, Abul Iqbal | 1988-12-13 |
| 4782153 | Pyridoquinolone derivatives | Abul Iqbal, Edward E. Jaffe | 1988-11-01 |
| 4778899 | Process for the preparation of pyrrolo (3,4-c) pyrroles | Johannes Pfenninger, Abul Iqbal, Olof Wallquist | 1988-10-18 |
| 4760004 | Thioquinacridones and isothioquinacridones, preparation and use thereof | Edward E. Jaffe, Jin Mizuguchi | 1988-07-26 |
| 4760151 | Dithioketo pyrrolopyrroles | Abul Iqbal, Remy Jeanneret, Jin Mizuguchi | 1988-07-26 |
| 4749795 | Phenyl substituted pyrrolinones | Johannes Pfenninger, Abul Igbal | 1988-06-07 |
| 4730014 | Use of pyridoquinolone derivatives as pigments | Abul Iqbal, Edward E. Jaffe | 1988-03-08 |
| 4720305 | Mixtures of pigments | Abul Iqbal, Johannes Pfenninger, Fridolin Babler | 1988-01-19 |
| 4681971 | Phenyl substituted aminodicarboxylate esters | Johannes Pfenninger, Abul Iqbal | 1987-07-21 |
| 4666455 | Compositions pigmented with N-substituted 1,4-diketopyrrolo-[3,4-c]-pyrroles | Max Jost, Abul Iqbal | 1987-05-19 |
| 4659775 | Process for the preparation of pyrrolo[3,4-c]pyrroles, and novel pyrrolo[3,4-c]pyrroles | Johannes Pfenninger, Abul Iqbal, Olof Wallquist | 1987-04-21 |
| 4632893 | Electrophotographic recording material containing selected dithioke topyrrolopyrroles | Abul Iqbal, Remy Jeanneret, Jin Mizuguchi | 1986-12-30 |
| 4613669 | Preparation of 1,4-diketopyrrolo-[3,4-c]pyrroles | Luigi Cassar, Abul Iqbal | 1986-09-23 |
| 4585878 | N-substituted 1,4-diketopyrrolo-[3,4-c]-pyrroles | Max Jost, Abul Iqbal | 1986-04-29 |