Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885385 | Sulfonyl containing compounds suitable as precurors for water-soluble fiber-reactive triphendioxazine compounds | Hartmut Springer, Walter Helmling | 1989-12-05 |
| 4851527 | Water-soluble triphendioxazine compounds | Hartmut Springer, Walter Helmling | 1989-07-25 |
| 4851542 | N.sub.1 -substituted 1H-benzytriazole hydroxyethyl sulfone compounds, a process for their preparation and their use for the preparation of dyestudds | Hartmut Springer | 1989-07-25 |
| 4816574 | Water-soluble triphendioxazine compounds | Hartmut Springer, Walter Helmling | 1989-03-28 |