Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814420 | Detecting the stoichiometric end point of phosgenation reactions | Daniel J. Brunelle, Thomas Gerard Shannon, Philip G. Kosky, Paul William Buckley | 1989-03-21 |
| 4814429 | Method for preparing cyclic polycarbonate oligomers | — | 1989-03-21 |
| 4810813 | Method for making reaction products of phosgene and dihydric phenol with stable suspension of dihydric phenol, alkali metal hydroxide and water | Philip G. Kosky, Thomas Joseph Fyvie | 1989-03-07 |