Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6613104 | Process for preparing dyes and/or brightener formulations | Wolfgang Zarges, Rolf Brockmann, Erwin Bacher | 2003-09-02 |
| 6241786 | Process for preparing dyes and/or brightener formulations | Wolfgang Zarges, Rolf Brockmann, Erwin Bacher | 2001-06-05 |
| 6025490 | Process for the preparation of substituted 4,4'-diaminostilbene-2,2'-disulphonic acids | Ulrich Feldhues, Rolf Brockmann, Udo Eckstein | 2000-02-15 |
| 4778603 | Process for the preparation of a concentrated aqueous reactive dyestuff solution | Jochen Koll, Joachim Wolff | 1988-10-18 |