Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7807836 | Preparation of perylen-3,4:9,10-tetracarboxylic dianhydride and also of naphtalene-1,8-dicarboximides | Bernhard Dung, Felix Mueller, Arno Boehm, Willi Helfer, Volker Weyrauch | 2010-10-05 |
| 7393956 | Method for the production of perylen-3,4:9,10-tetracarboxylic acid diimides and perylen-3,4:9,10-tetracarboxylic acid dianhydride and naphtalene-1,8-dicarboxylimides | Bernhard Dung, Felix Mueller, Arno Boehm, Willi Helfer, Volker Weyrauch | 2008-07-01 |
| 6326494 | 1,7-Diaroxy- or 1,7-arylthio-substituted perylene-3,4,9,10-tetracarboxylic acids, their dianhydrides and diimides | Arno Bohm, Harald Arms, Peter Blaschka | 2001-12-04 |
| 6184378 | 1,7-disubstituted perylene-3,4,9,10-tetracarboxylic acids, their dianhydrides and diimides | Arno Bohm, Harald Arms, Peter Blaschka | 2001-02-06 |
| 6143905 | 1,7-diaroxy- or 1,7-arylthio-substituted perylene-3,4,9,10-tetracarboxylic acids, their dianhydrides and diimides | Arno Bohm, Harald Arms, Peter Blaschka | 2000-11-07 |
| 6136976 | Process for producing perylene-3, 4-dicarboxylic acid imides | Arno Boehm, Harald Arms, Willi Helfer | 2000-10-24 |
| 6099636 | N,N'-dimethylperylene-3,4,9,10-tetracarboxylic acid diimide pigments suitable for water-based paints | Peter Blaschka, Arno Bohm | 2000-08-08 |
| 6084099 | Preparation of N,N'-dialkylperylene-3,4,9,10-tetracarboxylic acid diimides | Claus Hackmann, Michael Acker, Siegfried Mensch | 2000-07-04 |
| 6063181 | 1,7-disubstituted perylene-3,4,9, 10-tetracarboxylic acids, their dianhydrides and diimides of said acids | Arno Bohm, Harald Arms, Peter Blaschka | 2000-05-16 |
| 5484901 | Isoindolineazo pigments | Michael Krapp | 1996-01-16 |
| 5472494 | Pigment preparation with perylene derivatives as dispersants | Josef Hetzenegger, Peter Erk | 1995-12-05 |
| 5320647 | Fluent polyazo dye preparations and method of dying leather or wool therewith | Georg Zeidler, Ortwin Schaffer | 1994-06-14 |
| 5131981 | Coloring paper | Erwin Hahn, Manfred Mielke, Hans-Juergen Degen, Sigberg Pfohl | 1992-07-21 |
| 4846892 | Tetrachloroperylene-3,4,9,10-tetracarboxylic acid diimide pigment and its use | Erwin Hahn, Peter Hauser, Manfred Patsch | 1989-07-11 |
| 4645539 | Transparent isoindoline pigment having a high color strength | Wolfgang Lotsch | 1987-02-24 |
| 4599113 | Isoindoline pigment having a high color strength | Wolfgang Lotsch | 1986-07-08 |
| 4594411 | Sulfonated monoazo colorant lake obtained by di-azo coupling of 5-acetylamino-2-aminobenzene-1-sulfonic acid with 1-(3'-sulfophenyl)-3-methylphyrazol-5-one | — | 1986-06-10 |
| 4354969 | Dye mixtures | Bertold Honigmann, Gunther Lamm | 1982-10-19 |
| 4316023 | Isoindoline colorants | Wolfgang Lotsch | 1982-02-16 |
| 4264488 | Coloring of thermoplastics | Paul Guenthert | 1981-04-28 |
| 4248635 | High-hiding calcium color lakes having great full-shade brillance and improved lightfastness | Paul Guenthert | 1981-02-03 |