Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4433173 | Acetophenone purification | Vijai P. Gupta, Frank W. Melpolder | 1984-02-21 |
| 4287132 | Preparation of polyisocyanates from polycarbamates | Frank W. Melpolder | 1981-09-01 |