Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5690698 | Black dye mixtures of fiber-reactive azo dyes and their use for dyeing hydroxyl- and/or carboxamido-containing fiber material | Werner Russ, Dirk Buchwald | 1997-11-25 |
| 5609676 | Recycling of dyed cellulosic waste | — | 1997-03-11 |