Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4894065 | Method for producing wool dyeings of improved levelness and dye mixtures useful therefor: parameters for combination capacity and compensation of variable affinity for wool from root to tip of fiber | Oskar Annen, Wolfgang Beck | 1990-01-16 |
| 4852991 | Dyeing of polyamide fibers with anionic dyes using a cationic assistant followed by an anionic assistant | Dieter Schwer | 1989-08-01 |
| 4622045 | Method of dyeing wool with acid dyestuffs | Karl Zeller | 1986-11-11 |