Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6160169 | Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid | Armin Haag, Hellmut Kast, Peter Krotzsch | 2000-12-12 |
| 6036760 | Use of aqueous liquid dye concentrates comprising a disazo dye in the inkjet process and also disazo dyes | — | 2000-03-14 |
| 5892105 | Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid | Armin Haag, Hellmut Kast, Peter Krotzsch | 1999-04-06 |
| 5847113 | Preparation of sulfo-containing copper phthalocyanine dyes | — | 1998-12-08 |
| 5770708 | Preparation of phenylazonaphthalenes | — | 1998-06-23 |
| 5597905 | Preparation of benzothiazolylazoanilines | — | 1997-01-28 |
| 5531797 | Aqueous dye preparations containing coumarin dyes | Walter Breitschaft | 1996-07-02 |
| 5431723 | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye | Rainer Dyllick-Brenzinger, Karin H. Beck | 1995-07-11 |
| 5424403 | Preparation of aminoazo dyes | Heinz Keilhauer | 1995-06-13 |
| 5173086 | Concentrated aqueous solutions of 2-phenylbenzothiazoleazo dyes with mixed cations | — | 1992-12-22 |
| 4804387 | Liquid black dye mixture | Hans-Juergen Degen, Sigberg Pfohl | 1989-02-14 |
| 4668789 | Liquid dye salts | — | 1987-05-26 |
| 4560745 | Preparation of dyes which contain sulfonic acid groups and have a low electrolyte content | Volkmar Weberndoerfer, Friedrich Brunnmueller, Manfred Eisert | 1985-12-24 |