Issued Patents All Time
Showing 26–50 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4908041 | Navy and black dye mixtures: thiophene azo disperse dye and red, yellow or orange disperse dye | Erwin Hahn, Karl-Heinz Etzbach, Helmut Reichelt, Ernst Schefczik, Helmut Degen +2 more | 1990-03-13 |
| 4904777 | Mono azo dyes containing as diazo radical a thiophene radical which possesses an oxime group | Karl-Heinz Etzbach, Ernst Schefczik, Helmut Reichelt | 1990-02-27 |
| 4843153 | Azo dyes containing thienothiophene radicals as radicals of the diazo component | Heinz Eilingsfeld, Karl-Heinz Etzbach, Helmut Reichelt | 1989-06-27 |
| 4837269 | 2-aminothiophene radical substituted by an electron withdrawing group | Karl-Heinz Etzbach, Ernst Schefczik, Helmut Reichelt | 1989-06-06 |
| 4820809 | Heterocyclic azo dyes | Udo Bergmann, Erwin Hahn | 1989-04-11 |
| 4764600 | Isothiazolylazo dyes having aminophenyl and aminonaphthyl components | Udo Bergmann, Johannes P. Dix, Ernst Schefczik, Guenther Seybold | 1988-08-16 |
| 4751288 | Azo dyes containing 2-amino-3-cyano-5-formylthiophene derivatives as diazo components and substituted aniline compounds as coupling components | Udo Bergmann, Erwin Hahn, Helmut Reichelt | 1988-06-14 |
| 4668775 | .alpha.-methine substituted thiophene monoazo dye | Udo Bergmann, Erwin Hahn | 1987-05-26 |
| 4638055 | Iron, copper and chromium complexes of disazo dyes | Udo Bergmann, Georg Zeidler | 1987-01-20 |
| 4619992 | 3-(.beta.-aminoethyl)-4-cyano-isothiazolylazo dyes | Udo Bergmann, Johannes P. Dix, Ernst Schefczik | 1986-10-28 |
| 4563520 | Metal complexes of dis- or trisazo compounds containing a middle component twice substituted by hydroxy and/or amino | Udo Bergmann, Dietrich Lach, Georg Zeidler | 1986-01-07 |
| 4547566 | Copper, cobalt, nickel and iron complexes of disazo dyes | Udo Bergmann, Georg Zeidler | 1985-10-15 |
| 4537597 | Navy blue mixtures of disperse mono-azo dyes for cellulose acetate | Udo Bergmann, Helmut Degen, Reinhold Krallmann, Hans Weber | 1985-08-27 |
| 4521216 | Disazo dyes | Herbert Armbrust, Johannes P. Dix, Georg Zeidler | 1985-06-04 |
| 4496480 | Isothiazolazo dyes having coupling components which are free from unsaturated aliphatic radicals | Udo Bergmann, Johannes P. Dix, Ernst Schefczik | 1985-01-29 |
| 4491543 | Dis-, tris-, and tetrakisazo compounds containing resorcinol, sulfonylamino, and two or three sulfonic acid groups | Udo Bergmann, Dietrich Lach, Michael Thomas, Georg Zeidler | 1985-01-01 |
| 4486198 | Navy dye mixtures | Ernst Becker, Udo Bergmann, Helmut Degen, Reinhold Krallmann | 1984-12-04 |
| 4483795 | Substituted phenyl disazo dyes containing a 2-amino-substituted thiazole radical | Heinz Eilingsfeld, Guenther Seybold, Georg Zeidler | 1984-11-20 |
| 4479906 | Trisazo dye | Georg Zeidler, Wolfgang Schulte | 1984-10-30 |
| 4473376 | Dye mixtures of azo compounds soluble in organic solvents | Franz Merger, Gerhard Nestler, Georg Zeidler | 1984-09-25 |
| 4465628 | Azo dyes comprising a heterocyclic diazo component | Norbert Grund, Wolf-Dieter Kermer | 1984-08-14 |
| 4464181 | Mixtures of benzisothiazole mono-azo dyes for cellulose acetate | Helmut Degen, Johannes P. Dix, Norbert Grund, Reinhold Krallmann | 1984-08-07 |
| 4405330 | Navy disperse dye mixtures | Udo Bergmann, Helmut Degen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-09-20 |
| 4389216 | Navy dye mixtures | Udo Bergmann, Helmut Degen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-06-21 |
| 4386934 | Navy dye mixtures | Udo Bergmann, Helmut Degen, Reinhold Krallmann, Wolf-Dieter Kermer | 1983-06-07 |