Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881980 | Pigments of the quinacridonequinone series, processes for their preparation and their use | Frank Prokschy | 1989-11-21 |
| 4828622 | Process for preparing highly concentrated aqueous press cakes of solids | Joachim Weide, Reinhold Deubel | 1989-05-09 |
| 4812143 | Liquid formulations of disperse dyestuffs containing inorganic oxides or silicates for dyeing textile materials | Klaus Hofmann, Ulrich Buhler | 1989-03-14 |