Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946872 | Polyisocyanate prepolymers prepared from rigid polyaromatic precursor materials, and polyurethanes prepared therefrom | Oomman P. Thomas, Richard D. Peffley | 1990-08-07 |
| 4913821 | Method for the determination of phenols in water | Richard G. Melcher | 1990-04-03 |
| 4894403 | Polyisocyanate compositions containing rigid compounds or polymers, and polyurethanes prepared therefrom | Oomman P. Thomas, Richard D. Peffley | 1990-01-16 |