Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863634 | Anthraquinone dyestuffs | Uwe Claussen, Friedrich W. Krock | 1989-09-05 |
| 4721745 | Pigments based on metal complexes | Meinhard Rolf, Walter Muller | 1988-01-26 |
| 4709019 | Anthraquinone-azo pyridone-containing compounds | Meinhard Rolf, Walter Muller | 1987-11-24 |
| 4689171 | Anthraquinone dyestuffs, their preparation and use and dichroic material containing these anthraquinone dyestuffs | Martin Blunck, Uwe Claussen, Friedrich W. Krock | 1987-08-25 |
| 4666526 | Azine pigments, processes for their preparation, and their use | Meinhard Rolf | 1987-05-19 |
| 4628093 | Red nickel azine pigment | Meinhard Rolf, Walter Muller | 1986-12-09 |
| 4614547 | Azine pigments | Meinhard Rolf, Walter Muller | 1986-09-30 |
| 4596666 | Aryl-mercapto anthraquinone dyestuffs, their preparation and use and dichroic material containing aryl-mercapto anthraquinone dyestuffs | Martin Blunck, Uwe Claussen, Friedrich W. Krock | 1986-06-24 |
| 4585574 | Anthraquinone dyestuffs, processes for their preparation, their use, and liquid-crystalline materials containing anthraquinone dyestuffs | Martin Blunck, Uwer Claussen | 1986-04-29 |
| 4564680 | Isoindolazines | Meinhard Rolf, Walter Muller, Volker Hederich | 1986-01-14 |
| 4556401 | Process for dyeing amide-containing fibre materials | Robert Weitz, Herbert Hugl | 1985-12-03 |
| 4435589 | Process for the preparation of dimethyl succinylosuccinate, the disodium salt thereof, dianilinodihydroterephthalic acids, the dimethyl esters and salts thereof, and dianilinoterephthalic acids, and the dimethyl esters and salts thereof | Meinhard Rolf, Detlef-Ingo Schutze, Hans-Volker Runzheimer | 1984-03-06 |
| 4422973 | Process for the preparation of 1,4-diamino-2,3-dicyano-anthraquinone | Friedrich W. Krock | 1983-12-27 |
| 4389215 | Anthraquinone-azomethine compounds, processes for their preparation and processes for dyeing synthetic fibre materials and for pigmenting organic macromolecular substances | Meinhard Rolf, Walter Muller | 1983-06-21 |
| 4344827 | Process for working up nitric acid | Wolfgang Auge, Bernd Thelen, Karl-Werner Thiem | 1982-08-17 |
| 4334068 | Process for the preparation of triazinylamino-anthraquinones | — | 1982-06-08 |
| 4323670 | Anthraquinone-azomethine compounds, processes for their preparation and processes for pigmenting organic macromolecular substances | Meinhard Rolf, Walter Muller | 1982-04-06 |
| 4323671 | Anthraquinone derivatives, processes for their preparation, processes for pigmenting organic macromolecular substances, and pigmented organic macromolecular material | Meinhard Rolf, Walter Muller | 1982-04-06 |
| 4319025 | Anthraquinone-azomethine compounds, processes for their preparation and processes for dyeing synthetic fibre materials and for pigmenting organic macromolecular substances | Meinhard Rolf, Walter Muller | 1982-03-09 |
| 4309221 | Anthraquinone derivatives | Meinhard Rolf, Walter Muller | 1982-01-05 |
| 4294769 | Process for the preparation of 1,4-diamino-2,3-dicyano-anthraquinones | Friedrich W. Krock, Heinz Scheiter | 1981-10-13 |
| 4294578 | Colorants | Friedrich W. Krock | 1981-10-13 |
| 4290768 | Process for dyeing and printing cellulose fibres | Robert Kuth, Werner Kuhnel, Wilhelm Gohrbandt | 1981-09-22 |
| 4288362 | Monoazo pigments containing a quinazo linonylacetoacetanilide coupling component | Meinhard Rolf, Walter Muller | 1981-09-08 |
| 4285874 | 1-Isocyanato-anthraquinones | Rudolf Braden | 1981-08-25 |