Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6613104 | Process for preparing dyes and/or brightener formulations | Wolfgang Zarges, Erwin Bacher, Detlef Szeymies | 2003-09-02 |
| 6596864 | Stilbene brightener | Uwe Vogt, Thomas Roick, Karl-Rudolf Gassen, Ulrich Feldhues | 2003-07-22 |
| 6248887 | Process for preparing bis-alkoxy-triazinyl-amino-containing stilbene disulphonic acids or their derivatives | Ulrich Feldhues, Uwe Vogt, Udo Eckstein, Dietmar Fiedel | 2001-06-19 |
| 6241786 | Process for preparing dyes and/or brightener formulations | Wolfgang Zarges, Erwin Bacher, Detlef Szeymies | 2001-06-05 |
| 6121444 | Process for preparing substituted 4,4'-diaminostilbene-2,2'-disulphonic acid salts | Ulrich Feldhues, Udo Eckstein, Uwe Vogt | 2000-09-19 |
| 6025490 | Process for the preparation of substituted 4,4'-diaminostilbene-2,2'-disulphonic acids | Ulrich Feldhues, Udo Eckstein, Detlef Szeymies | 2000-02-15 |
| 5220057 | Formazan dyestuffs | Thomas Eizenhofer, Karl-Josef Herd, Hermann Henk, Frank-Michael Stohr, Karl H. Schundehutte | 1993-06-15 |
| 5095102 | 6-substituted sulphonyl-8-sulpho-2-naphthyl monoazo reactive dyestuffs | Karl-Josef Herd, Manfred Hoppe, Hermann Henk, Frank-Michael Stohr | 1992-03-10 |
| 4988234 | Gulley closure | Hanno Henkel, Karl-Heinz Rudolph, Friedhelm Sahlmen | 1991-01-29 |
| 4655879 | Glycerol distillation process | Lutz Jeromin, Wilhelm Johannisbauer, Helmut Meyer, Otto Michel, Juergen Plachenka | 1987-04-07 |
| 4637857 | Process for the removal of residual constituents | Clemens Casper, Walter Damsky, Axel Lippert, Johannes O. Sajben | 1987-01-20 |