Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879036 | Asymmetrical membrane of polyester-amide and process for preparing it | Francesco Pittalis, Otello Farias | 1989-11-07 |
| 4830796 | Process for preparing a polyester-amide hollow fiber membrane | Francesco Pittalis | 1989-05-16 |
| 4826663 | Zirconium phosphate and method for its preparation | Giulio Alberti, Umberto Constantino, Francesco Di Gregorio, Claudio Valentini | 1989-05-02 |