| 5554774 |
Preparation of chlorinated violanthrones or isoviolanthrones |
Gerhard Sch afer, Heinrich Kowarsch |
1996-09-10 |
|
| 5536842 |
Purification of indigo |
Manfred Gang, Reinhold Kohlhaupt |
1996-07-16 |
|
| 5534627 |
Polycyclic vat dyes |
Harald Schlueter, Michael Schmitt |
1996-07-09 |
|
| 5525743 |
Preparation of anthraquinone imide compounds |
Helmut Hoch, Heike Kilburg, Reinhold Kohlhaupt, Matthias Niedenbrueck |
1996-06-11 |
|
| 5424453 |
Purification of indigo |
Reinhold Kohlhaupt |
1995-06-13 |
|
| 5386042 |
Preparation of 1,4-diaminoanthraquinone-2,3-disulfonic acid and 1,4-diaminoanthraquinone-2,3-dinitrile |
Matthias Dust, Gerd Schwantje |
1995-01-31 |
|
| 5380871 |
Preparation of halogenated indigo |
Reinhold Kohlhaupt, Lothar Haas |
1995-01-10 |
|
| 5245058 |
Preparation of 1-nitroanthraquinone-2-carboxylic acids |
Helmut Hagen, Jacques Dupuis, Michael Acker |
1993-09-14 |
|
| 5003049 |
Dyes containing fluorotriazine and dichloropyridazone groups |
Alfred Hackenberger, Manfred Patsch |
1991-03-26 |
|
| 4960874 |
Isothiazolylazo dyes having aminophenyl and aminonaphthyl components |
Johannes D. Dix, Guenter Hansen, Ernst Schefczik, Guenther Seybold |
1990-10-02 |
|
| 4820809 |
Heterocyclic azo dyes |
Erwin Hahn, Guenter Hansen |
1989-04-11 |
|
| 4764600 |
Isothiazolylazo dyes having aminophenyl and aminonaphthyl components |
Johannes P. Dix, Guenter Hansen, 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 |
Erwin Hahn, Guenter Hansen, Helmut Reichelt |
1988-06-14 |
|
| 4668775 |
.alpha.-methine substituted thiophene monoazo dye |
Erwin Hahn, Guenter Hansen |
1987-05-26 |
|
| 4638055 |
Iron, copper and chromium complexes of disazo dyes |
Guenter Hansen, Georg Zeidler |
1987-01-20 |
|
| 4619992 |
3-(.beta.-aminoethyl)-4-cyano-isothiazolylazo dyes |
Johannes P. Dix, Guenter Hansen, Ernst Schefczik |
1986-10-28 |
|
| 4563520 |
Metal complexes of dis- or trisazo compounds containing a middle component twice substituted by hydroxy and/or amino |
Guenter Hansen, Dietrich Lach, Georg Zeidler |
1986-01-07 |
|
| 4547566 |
Copper, cobalt, nickel and iron complexes of disazo dyes |
Guenter Hansen, Georg Zeidler |
1985-10-15 |
|
| 4537597 |
Navy blue mixtures of disperse mono-azo dyes for cellulose acetate |
Helmut Degen, Guenter Hansen, Reinhold Krallmann, Hans Weber |
1985-08-27 |
|
| 4496480 |
Isothiazolazo dyes having coupling components which are free from unsaturated aliphatic radicals |
Johannes P. Dix, Guenter Hansen, Ernst Schefczik |
1985-01-29 |
|
| 4491543 |
Dis-, tris-, and tetrakisazo compounds containing resorcinol, sulfonylamino, and two or three sulfonic acid groups |
Guenter Hansen, Dietrich Lach, Michael Thomas, Georg Zeidler |
1985-01-01 |
|
| 4486198 |
Navy dye mixtures |
Ernst Becker, Helmut Degen, Guenter Hansen, Reinhold Krallmann |
1984-12-04 |
|
| 4414552 |
Printing head for ink jet printers |
Heinrich Kurz, Wolfgang Radtke |
1983-11-08 |
$475,000 |
| 4405330 |
Navy disperse dye mixtures |
Helmut Degen, Guenter Hansen, Reinhold Krallmann, Wolf-Dieter Kermer |
1983-09-20 |
|
| 4389216 |
Navy dye mixtures |
Helmut Degen, Guenter Hansen, Reinhold Krallmann, Wolf-Dieter Kermer |
1983-06-21 |
|
