Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5110917 | Water-soluble trisazo dyes | Willi Steckelberg, Josef Ritter | 1992-05-05 |
| 4973672 | Water-soluble aminonaphthol disazo dyestuffs, their preparation and their use | Klaus Hunger | 1990-11-27 |
| 4923887 | Liquid formulations of 1,2-benzisothiazolin-3-one, their preparation and their use | Hans-Walter Bucking, Karl H. Wallhausser | 1990-05-08 |
| 4917731 | Water-soluble black trisazo dyestuffs | Konstantin Morgenroth, Kuno Reh, Josef Ritter | 1990-04-17 |
| 4918221 | Process for preparing 2,5-dichlorophenylthioglycollic acid | Willi Steckelberg | 1990-04-17 |
| 4902826 | Process for the preparation of 2-arylthiobenzoic acids | Manfred Langer, Kuno Reh | 1990-02-20 |
| 4881977 | Water-soluble yellow monoazo dyestuffs | Willi Steckelberg, Josef Ritter | 1989-11-21 |
| 4871754 | Aqueous formulation of 1,2-benzisothiazolin-3-one | Willi Steckelberg | 1989-10-03 |
| 4810254 | Wet-fastness properties of sulphur dyestuffs dyeings on cellulose treated with poly-di-allyl-ammonium salt | Karl-Heinz Keil, Gert Nagl, Manfred Kaiser, Joachim Steinbach, Klaus Sternberger | 1989-03-07 |
| 4769454 | Process for the preparation of N-methylol-caprolactam | Heinz U. Blank | 1988-09-06 |
| 4686303 | Process for the preparation of diaryl sulphides | Manfred Langer, Winfried Sperling | 1987-08-11 |
| 4548987 | ABS-Polycarbonate mixtures which have improved flame resistance | Christian Lindner, Friedemann Muller, Hans-Jurgen Kress, Karl Zabrocki, Josef Buekers | 1985-10-22 |
| 4486350 | Process for the preparation of sulphur dyestuffs of the phthalocyanine series | Klaus Kuhlein, Gert Nagl | 1984-12-04 |
| 4485042 | Dyestuff containing at least three azo bridges | Norbert Armbrecht, Joachim Ribka | 1984-11-27 |
| 4348204 | Aqueous dyestuff formulation, a process for its preparation and its use for dyeing and printing | Heinz Dickmanns, Konstantin Morgenroth, Kuno Reh, Joachim Ribka | 1982-09-07 |
| 4329503 | Process for the preparation of 2-amino-4-nitrophenol | Klaus Kuhlein | 1982-05-11 |
| 4254026 | Water-soluble monoazo dyestuffs | Joachim Ribka | 1981-03-03 |
| 4242802 | Drawing pattern for the human form | Rolf-Dieter Jenner, Dieter Schafer | 1981-01-06 |
| 4225492 | Water-soluble disazo dyestuffs, prepared from unsymmetrical heterocyclic diamines | Joachim Ribka | 1980-09-30 |
| 4192947 | Process for the production of aminophenylaminobenzimidazoles | Joachim Ribka | 1980-03-11 |