Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859730 | Aqueous suspension polymerization process of compositions containing styrene in the presence of rosin acid derivatives and their salts and expandable or non expandable polystyrene obtained | — | 1989-08-22 |
| 4814355 | Aqueous suspension polymerization process of compositions containing styrene in the presence of rosin acid derivatives and their salts and expandable or non expandable polystyrene obtained | — | 1989-03-21 |