Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4709019 | Anthraquinone-azo pyridone-containing compounds | Meinhard Rolf, Rutger Neeff | 1987-11-24 |
| 4628093 | Red nickel azine pigment | Rutger Neeff, Meinhard Rolf | 1986-12-09 |
| 4614547 | Azine pigments | Rutger Neeff, Meinhard Rolf | 1986-09-30 |
| 4564680 | Isoindolazines | Meinhard Rolf, Rutger Neeff, Volker Hederich | 1986-01-14 |
| 4389215 | Anthraquinone-azomethine compounds, processes for their preparation and processes for dyeing synthetic fibre materials and for pigmenting organic macromolecular substances | Rutger Neeff, Meinhard Rolf | 1983-06-21 |
| 4323670 | Anthraquinone-azomethine compounds, processes for their preparation and processes for pigmenting organic macromolecular substances | Rutger Neeff, Meinhard Rolf | 1982-04-06 |
| 4323671 | Anthraquinone derivatives, processes for their preparation, processes for pigmenting organic macromolecular substances, and pigmented organic macromolecular material | Rutger Neeff, Meinhard Rolf | 1982-04-06 |
| 4319025 | Anthraquinone-azomethine compounds, processes for their preparation and processes for dyeing synthetic fibre materials and for pigmenting organic macromolecular substances | Rutger Neeff, Meinhard Rolf | 1982-03-09 |
| 4309221 | Anthraquinone derivatives | Rutger Neeff, Meinhard Rolf | 1982-01-05 |
| 4288362 | Monoazo pigments containing a quinazo linonylacetoacetanilide coupling component | Meinhard Rolf, Rutger Neeff | 1981-09-08 |
| 4284411 | Anthraquinone derivatives for pigmenting organic macromolecular substances | Rutger Neeff, Meinhard Rolf | 1981-08-18 |
| 4260540 | Azo dye pigments containing 4-quinazolinone moieties | Meinhard Rolf, Rutger Neeff | 1981-04-07 |
| 4246401 | Axomethine pigments | Rutger Neeff, Meinhard Rolf | 1981-01-20 |
| 4225489 | Heterocyclic azo dyes and pigments containing 4-quinazolinone moieties | Meinhard Rolf, Rutger Neeff | 1980-09-30 |