Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880899 | Cyclic polyphenylene ether-polycarbonate oligomers | Thomas Link Guggenheim | 1989-11-14 |
| 4868279 | Spiro(bis) indane copolyamide and preparation thereof | Thomas Link Guggenheim, Sharon J. McCormick, Alice M. Colley | 1989-09-19 |
| 4808754 | Spirobiindane bis-aminophenoxy ethers | Thomas Link Guggenheim, Sharon J. McCormick | 1989-02-28 |