Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7193085 | Acid Red 82 in mixtures | Thomas Sommermann | 2007-03-20 |
| 6297362 | Azo dyes | Klaus Kunde, Michael-Thomas Jorss | 2001-10-02 |
| 6120561 | Process for the preparation of low-salt, liquid dyestuff preparations | Volker Paulat, Wolfgang Frank, Shaun Murphree | 2000-09-19 |
| 5786459 | Tetrazo dyestuffs | Frank-Michael Stohr | 1998-07-28 |
| 5684139 | Direct disazo dyestuffs | Karin Hassenruck, Frank-Michael Stohr | 1997-11-04 |
| 5646257 | Azodyestuffs, their preparation and their use | Karin Hassenruck, Karl-Heinz Reinhardt, Klaus Wunderlich | 1997-07-08 |
| 5637679 | Azo dyestuffs for dyeing and printing cellulose-containing fiber materials in an ink jet process | Karin Hassenruck, Frank-Michael Stohr | 1997-06-10 |
| 5607502 | Dyestuffs for printing inks | Karin Hassenruck, Martin Michna | 1997-03-04 |
| 5580964 | Cationic thiadiazole dyestuffs | Horst Berneth, Uwe Claussen, Werner Hartwich | 1996-12-03 |
| 5519121 | Triazinyl-amino bridge-containing disazo dyestuffs | Gerd-Friedrich Renner, Karin Hassenruck | 1996-05-21 |
| 5468848 | Basic azo dyestuffs of the 3-cyano-2,4,6-triamino pyridine series | Karin Hassenruck | 1995-11-21 |
| 5295999 | Dyestuff mixtures | Rolf Hinrichs | 1994-03-22 |
| 5213582 | Light-polarizing films or foils containing triphendioxazine or triphendithiazine dyes with good dichrditic properties | Uwe Claussen, Friedrich W. Krock | 1993-05-25 |
| 5034017 | Process for the coloring of paper with disazo dyes containing sulfonated-naphthol groups to give fast blue shades | Klaus Kunde | 1991-07-23 |
| 5001229 | Water soluble basic dyestuffs | Gunter Franke | 1991-03-19 |
| 4990615 | Triphendioxazine and triphendithiazine direct dyestuffs | Hermann Henk, Wolfgang Harms | 1991-02-05 |
| 4839468 | N-(hydroxy-sulpho-naphthyamino-triazinyl)-arylene-diamines | Horst Nickel, Frank-Michael Stohr | 1989-06-13 |
| 4710569 | Basic dyestuffs | Gunter Franke, Dieter Ockelmann, Roderich Raue | 1987-12-01 |
| 4509948 | Cationic mono- and dis-azo dyestuffs, and their preparation and use for dyeing paper and cationic dyeable substrates | Frank-Michael Stohr | 1985-04-09 |
| 4435334 | Naphtholsulphonic acid compounds, their preparation and use as coupling components | Frank-Michael Stohr, Horst Nickel | 1984-03-06 |
| 4411669 | Processes for dyeing paper, and agents containing azo dyestuffs | Horst Nickel | 1983-10-25 |
| 4294580 | Reactive dyestuffs, their preparation and their use for dyeing materials containing OH or N | Hermann Henk, Klaus Wunderlich | 1981-10-13 |
| 4239886 | Salts of N-acylaminohydroxynaphthalenesulphonic acids | Horst Nickel | 1980-12-16 |
| 4228541 | Device for the electro-optical display of the tuning of a television and/or sound radio receiver | Ole Snedkerud | 1980-10-14 |
| 4202606 | Liquid crystal display having integrated bridge contacts | — | 1980-05-13 |