Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4992101 | Process for the preparation of opaque diketopyrrolo-pyrrole pigments | Edward E. Jaffe | 1991-02-12 |
| 4978755 | Perylenetetracarboxylic acid diimides having long-chain radicals containing carbonyl groups | — | 1990-12-18 |
| 4946948 | Mono and disazo compounds based on b-hydroxy-naphthoic acid derivatives or acetoacetarylide derivatives containing long-chain alkyl ester or alkylamide radicals | Stefan Hari | 1990-08-07 |
| 4810304 | Solid solutions of pyrrolo-(3,4-C)-pyrroles with quinacridones | Edward E. Jaffe | 1989-03-07 |
| 4801702 | Process for the preparation and conditioning or organic pigments | — | 1989-01-31 |
| 4783540 | Solid solutions of pyrrolo-(3,4-C)-pyrrols | — | 1988-11-08 |
| 4720305 | Mixtures of pigments | Abul Iqbal, Johannes Pfenninger, Alain C. Rochat | 1988-01-19 |
| 4692189 | Novel compositions based on indanthrone blue pigments | Edward E. Jaffe, Bernhard Medinger | 1987-09-08 |
| 4632704 | Process for the preparation of high yield pigments | — | 1986-12-30 |
| 4554094 | Electrically conductive fillers | Kurt Munk | 1985-11-19 |
| 4550215 | Process for the preparation of perylene | — | 1985-10-29 |
| 4517320 | Stoving lacquers containing graphite | Adolf Weissmuller | 1985-05-14 |
| 4477608 | Compositions containing graphite | Adolf Weissmuller | 1984-10-16 |
| 4436852 | Process for the coloration of linear polyesters in the melt with perylenetetracarboxylic acid bis-methylimide | — | 1984-03-13 |
| 4404385 | Novel modification of perylenetetracarboxylic acid-bis-(3,5-dimethylphenyl)imide | — | 1983-09-13 |
| 4404386 | Process for the preparation of opaque perylenetetracarboxylic acid bis-(3,5-dimethylphenylimide) | — | 1983-09-13 |
| 4305873 | Process for converting a pigment into another modification via liquid alkylamine treatment | — | 1981-12-15 |
| 4272298 | Process for conditioning a pigment in liquid ammonia | — | 1981-06-09 |
| 4250079 | Process for the manufacture of a perylene-3,4,9,10-tetracarboxylic dianhydride pigment with improved properties | — | 1981-02-10 |
| 4238386 | Process for the mass pigmenting of rigid polyvinyl chloride and polyolefins | — | 1980-12-09 |
| 4231918 | Process for the mass coloration of linear polyesters | — | 1980-11-04 |