Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864034 | Spiro(bis)indane bis-oxyphthalic acids and functional derivatives thereof | Gary R. Faler | 1989-09-05 |
| 4864015 | Method for making thianthrene dianhydride and polyimides obtained therefrom | Deborah Ann Haitko | 1989-09-05 |
| 4855391 | High temperature stable polyetherimides from oxydiphthalic dianhydride and a mixture of m- and p-phenylene diamines and diaminodiphenyl ether | Donald R. Berdahl, Gary Shank | 1989-08-08 |
| 4837298 | Cyclic imides from spirobiindane diamines and methods of preparation | Thomas Link Guggenheim | 1989-06-06 |
| 4833190 | Zinc borate as a smoke suppressant | Elbridge A. O'Neil, Jr., David A. Williams | 1989-05-23 |
| 4814466 | Method for making thianthrene dianhydride and polyimides obtained therefrom | Deborah Ann Haitko | 1989-03-21 |
| 4808686 | Silicone-polyimides, and method for making | Patrick E. Gallagher, Gary Shank | 1989-02-28 |