Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35359 | Amine salts of azo pigments based on pyrazolone derivatives | Georg Cseh | 1996-10-22 |
| 5395926 | Bisazo, bisazomethine and azo-azomethine compounds derived from 1,4-phenylenediamine sulfonic acid salts | Olof Wallquist | 1995-03-07 |
| 5380870 | Mixed crystals of sulfonated diketopyrrolopyrroles | Olof Wallquist, Fritz Herren, Thomas Eichenberger | 1995-01-10 |
| 5298609 | Disazo compounds containing cycloalkyl ester or cycloalkylamide groups | — | 1994-03-29 |
| 5280121 | Perylenetetracarboxylic acid diimides containing long-chain alkanoylamino radicals | — | 1994-01-18 |
| 5151505 | Amine salts of azo pigments based on pyrazolone derivatives | Georg Cseh | 1992-09-29 |
| 5071967 | Disazo compounds containing long-chain alkyl ester radicals or alkylamide radicals | Jost von der Crone | 1991-12-10 |
| 4997920 | Monoazo compounds containing long-chain alkyl radicals | Olof Wallquist, Jost von der Crone | 1991-03-05 |
| 4992495 | Process for coloring high-molecular weight organic material using amine salts of azo pigments based on pyrazolone derivatives | Georg Cseh | 1991-02-12 |
| 4980458 | Mixed sodium, ammonium and/or calcium salt crystals of laked monoazo disulfonated pyrazolone pigments | Arnold Grubenmann, Andreas Burkhard | 1990-12-25 |
| 4946948 | Mono and disazo compounds based on b-hydroxy-naphthoic acid derivatives or acetoacetarylide derivatives containing long-chain alkyl ester or alkylamide radicals | Fridolin Babler | 1990-08-07 |
| 4737581 | Phenyl-azo-hydroxynaphthoic acid amide pigments containing at least one carbonamide group | — | 1988-04-12 |
| 4602961 | Process for pigmenting high molecular weight organic material | — | 1986-07-29 |
| 4473500 | Monoazo pigments derived from aminophthalimides and substituted acetoacetarylides or 2-hydroxy-3-naphthoylarylides | Georg Cseh | 1984-09-25 |
| 4400319 | Monoazo pigments containing heterocycles, and high-molecular organic materials dyed therewith | Arnold Wick | 1983-08-23 |
| 4263205 | Monoazo pigments derived from substituted aminothiophenes | — | 1981-04-21 |
| 4220586 | Hetero-aryl azo acylamino substituted aceto-acetarylide pigments | Georg Cseh, Armand Roueche | 1980-09-02 |