Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4918220 | Separation of toluene diisocyanate from the residues of the production thereof | Gerard Collas, Georges Gros | 1990-04-17 |
| 4871828 | Purification/isolation of isocyanate condensates | Andre Blind, Gerard Collas, Jean-Pierre Robin | 1989-10-03 |