Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864015 | Method for making thianthrene dianhydride and polyimides obtained therefrom | James Anthony Cella | 1989-09-05 |
| 4814466 | Method for making thianthrene dianhydride and polyimides obtained therefrom | James Anthony Cella | 1989-03-21 |