Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5476886 | Polyamides mass coloured with diketopyrrolopyrrole pigments | Bernd Lamatsch | 1995-12-19 |
| 5476949 | Finely divided highly transparent diketopyrrolopyrrole pigments | Gary Wooden, Thomas Eichenberger, Ingo Schloder | 1995-12-19 |
| 5424452 | Diketopyrrolopyrroles and pigments thereof | Gary Wooden, Guy de Weck | 1995-06-13 |
| 5395926 | Bisazo, bisazomethine and azo-azomethine compounds derived from 1,4-phenylenediamine sulfonic acid salts | Stefan Hari | 1995-03-07 |
| 5380870 | Mixed crystals of sulfonated diketopyrrolopyrroles | Stefan Hari, Fritz Herren, Thomas Eichenberger | 1995-01-10 |
| 5342955 | Diketopyrrolopyrroles | Gary Wooden, Guy de Weck | 1994-08-30 |
| 5271759 | Pigment compositions | Gary Wooden | 1993-12-21 |
| 5238984 | Dianthraquinonyl compounds | Guy de Weck, Gary Wooden | 1993-08-24 |
| 5200528 | Diketopyrrolopyrroles | Gary Wooden, Guy de Weck | 1993-04-06 |
| 5017706 | Monoketopyrrolopyrroles | Alain C. Rochat, Abul Iqbal | 1991-05-21 |
| 4997920 | Monoazo compounds containing long-chain alkyl radicals | Stefan Hari, Jost von der Crone | 1991-03-05 |
| 4810802 | Process for the preparation of brominated pyrrolo-[3,4-c]-pyrroles and mixtures thereof | Abul Iqbal, Johannes Pfenninger, Alain C. Rochat | 1989-03-07 |
| 4778899 | Process for the preparation of pyrrolo (3,4-c) pyrroles | Johannes Pfenninger, Abul Iqbal, Alain C. Rochat | 1988-10-18 |
| 4659775 | Process for the preparation of pyrrolo[3,4-c]pyrroles, and novel pyrrolo[3,4-c]pyrroles | Johannes Pfenninger, Abul Iqbal, Alain C. Rochat | 1987-04-21 |