Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839468 | N-(hydroxy-sulpho-naphthyamino-triazinyl)-arylene-diamines | Peter Wild, Frank-Michael Stohr | 1989-06-13 |
| 4591634 | Trisazo/azoxy dyestuff mixtures | Karl J. Herd | 1986-05-27 |
| 4544737 | Piperazinyl-triazinylnaphtholsulphonic acid azo dyes | Frank-Michael Stohr | 1985-10-01 |
| 4540776 | Reactive fluorotriazinylaminonaphthotriazolyphenylazopyridone or pyrimidone dyestuffs | Hermann Henk, Erich Kramer, Karl H. Schundehutte | 1985-09-10 |
| 4539009 | Dyestuff mixture | Hans Otten | 1985-09-03 |
| 4521217 | Phthalocyanine and azo dyestuff mixtures and their use for dyeing paper | Ulrich Beck, Frank-Michael Stohr | 1985-06-04 |
| 4478681 | Forgery-proof paper | Friedhelm Muller | 1984-10-23 |
| 4435334 | Naphtholsulphonic acid compounds, their preparation and use as coupling components | Frank-Michael Stohr, Peter Wild | 1984-03-06 |
| 4411669 | Processes for dyeing paper, and agents containing azo dyestuffs | Peter Wild | 1983-10-25 |
| 4387050 | Polyazo dyestuffs, a process for their preparation and their use for dyeing vegetable fibre materials and leather | — | 1983-06-07 |
| 4354968 | Azo reactive dyestuffs having an aryl-triazinyl-aryl diazo component | Erich Kramer, Karl H. Schundehutte | 1982-10-19 |
| 4337195 | Azo dyestuffs | Hans-Joachim Vater, Hermann Henk | 1982-06-29 |
| 4333874 | Cationic triazinylamino azo dyestuffs | Friedhelm Muller, Peter Mummenhoff | 1982-06-08 |
| 4297278 | Pentakis-and heptakis-azoxy dyestuffs | — | 1981-10-27 |
| 4265813 | Azo dyestuffs | Karl H. Schundehutte | 1981-05-05 |
| 4248771 | Metal complex reactive dyestuffs | Walter Scholl | 1981-02-03 |
| 4239886 | Salts of N-acylaminohydroxynaphthalenesulphonic acids | Peter Wild | 1980-12-16 |
| 4225493 | Disazo dyestuffs derived from three carbocyclic components including a terminal component substituted with sulfo and alkoxy | Fritz Suckfull | 1980-09-30 |