Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851506 | Photostructurable polyimide mixtures | Ottmar Rohde, Andre Perret | 1989-07-25 |
| 4847359 | Diamino-9,10-dihydroanthracenes and polyamide acid (esters) and polyimides derived therefrom | Rudolf Duthaler | 1989-07-11 |
| 4814233 | Material coated with polyamic acid ester | — | 1989-03-21 |
| 4808732 | Amino-tetraalkylbenzoylphthalic acids | — | 1989-02-28 |