Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877412 | "Sulfo group-containing monoazo compounds having an unsubstituted or substituted 4-(benzothiazol-2'-yl)phenyl or 4-(6'-benzothiazol-2""yl)-benzothiazol-2'-yl)phenyldiazo component radical and a 6-hydroxypyrid-2-one coupling component radical" | — | 1989-10-31 |
| 4875903 | Monoazo compounds containing a 2-sulfophenyl diazo component radical and a 1-hydroxy-naphthalene-sulfonic or disulfonic acid coupling component radical and two substituted 1,3,5-triazine rings | — | 1989-10-24 |
| 4876342 | Oxazine compounds substituted by one or more basic groups and preparation thereof | — | 1989-10-24 |
| 4833235 | Sulfo group-containing disaz compounds having a heterocyclic coupling component radical | — | 1989-05-23 |