Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4960890 | Methine dyes which have at least one heterocycle containing two nitrogen atoms and preparation thereof | Ewald Daltrozzo | 1990-10-02 |
| 4876347 | Methine dyes having a pyridyl group and a pyridyl or a quinolinyl group | Ewald Daltrozzo | 1989-10-24 |
| 4751309 | Methine dyes and preparation thereof | Ewald Daltrozzo | 1988-06-14 |