Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4284411 | Anthraquinone derivatives for pigmenting organic macromolecular substances | Meinhard Rolf, Walter Muller | 1981-08-18 |
| 4278434 | Transfer printing process and printing inks and temporary supports for carrying out this process | Friedrich W. Krock, Robert Kuth | 1981-07-14 |
| 4264511 | Anthraquinone compounds | Friedrich W. Krock | 1981-04-28 |
| 4260540 | Azo dye pigments containing 4-quinazolinone moieties | Meinhard Rolf, Walter Muller | 1981-04-07 |
| 4246401 | Axomethine pigments | Meinhard Rolf, Walter Muller | 1981-01-20 |
| 4225489 | Heterocyclic azo dyes and pigments containing 4-quinazolinone moieties | Meinhard Rolf, Walter Muller | 1980-09-30 |