Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5607502 | Dyestuffs for printing inks | Karin Hassenruck, Peter Wild | 1997-03-04 |
| 5421872 | Dyestuffs for printing inks | Artur Haus, Rolf Richter | 1995-06-06 |
| 5239063 | Fibre reactive azo dyestuffs | Manfred Hoppe, Karl-Josef Herd, Frank-Michael Stohr | 1993-08-24 |
| 5176718 | Reactive dyestuff preparations containing pyridine derivatives | Manfred Hoppe, Karl-Josef Herd, Hermann Henk, Frank-Michael Stohr | 1993-01-05 |
| 5145485 | Process for the preparation of stable dyestuff solutions: pressure permeation in presence of boric acid or borate | Werner Zillger, Dietrich Tegtmeyer | 1992-09-08 |
| 5096458 | Preparation of stable anionic dyestuff solutions: pressure permeation of crude dye in solution of lithium or ammonium salt | Hans-Werner Zillger, Dietrich Tegtmeyer | 1992-03-17 |
| 4638054 | Aminonaphthol bisazo reactive dyes | Karl-Josef Herd | 1987-01-20 |
| 4548761 | Process for the preparation of 1-aminobenzene-2-sulphonic acids | Hermann Henk | 1985-10-22 |
| 4514188 | Use of disazo-copper complex dyestuffs for dyeing natural and synthetic materials | Hermann Henk | 1985-04-30 |