Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4283196 | Process for coloring fiber materials with azo dyestuff containing --SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H and --N(CH.sub.2 CH.sub.2 OSO.sub. H).sub.2 groups | Johann Wenghoefer, James E. Thompson | 1981-08-11 |
| 4271072 | Azo dyestuffs containing -SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H and -N(CH.sub.2 CH.sub.2 OSO.sub.3 H).sub.2 groups | Johann Wenghoefer, James E. Thompson | 1981-06-02 |