Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4346188 | Polyolefin compositions stabilized against UV-radiations by pyrrolidine derivatives | Silvestro Costanzi, Francesco Tessarolo, Maurizio Brunelli | 1982-08-24 |
| 4325864 | Pyrrolidine-ring-containing compositions for use as anti-UV stabilizers in plastics materials | Silvestro Costanzi, Francesco Tessarolo | 1982-04-20 |
| 4321190 | Polyolefin compositions stabilized against UV light radiations with open-chain hindered amines | Silvestro Costanzi, Francesco Tessarolo, Tito Salvatori | 1982-03-23 |