Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889655 | Mixtures of fluorescent whitening agents | Heinz Hefti, Klaus Artz, Kurt Weber, Dieter Reinehr | 1989-12-26 |
| 4847404 | Stilbene derivatives by desulfonation | Kurt Weber, Dieter Reinehr | 1989-07-11 |
| 4831068 | Process for improving the photochemical stability of dyeings on polyester fibre materials | Gerhard Reinert | 1989-05-16 |