Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7262294 | Photochromatic pyrano-1,3-oxazinonaphthalene derivatives | William Giroldini, Vincenzo Malatesta | 2007-08-28 |
| 6414057 | Photochromatic compounds, process for their preparation and their use in polymeric materials | William Giroldini, Vincenzo Malatesta, Maria Lucia Wis | 2002-07-02 |
| 6353044 | Light-stabilized organic polymers | Fabio Broussard, Carlo Neri, Mauro Adovasio | 2002-03-05 |
| 5730908 | Photochromatic and thermochromatic compounds and their application in polymeric materials | Nereo Nodari, Pietro Allegrini | 1998-03-24 |
| 5688846 | Spiro-pyranic compounds endowed with photochromic characteristics | Pietro Allegrini, Nereo Nodari, Vincenzo Malatesta | 1997-11-18 |
| 5543533 | Photochromic products and method for their preparation | Pietro Allegrini, Nereo Nodari, Vincenzo Malatesta | 1996-08-06 |
| 5532361 | Spiro-pyranic compounds endowed with photochromic characteristics | Pietro Allegrini, Nereo Nodari, Vincenzo Malatesta | 1996-07-02 |
| 5242624 | Stabilizing mixture for compounds having a photochromatic activity | Vincenzo Malatesta, Pietro Allegrini | 1993-09-07 |
| 5225113 | Photochromatic composition endowed with light fatigue resistance and photochromatic articles which contain it | Carlo Busetto | 1993-07-06 |
| 5225563 | Photochromatic compound, a method for its preparation, and articles which contain it | Carlo Neri, William Giroldini, Antonio Rinaldi | 1993-07-06 |
| 5186867 | Spiro-indoline oxazine compounds with photochromatic and photosensitizing characteristics and the process for their preparation | Graziano Castaldi, Pietro Allegrini, Fiorenzo Renzi | 1993-02-16 |
| 5180524 | Photochromatic composition and photochromatic articles which contain it | Nicola Casilli, Fiorenzo Renzi, Franco Rivetti | 1993-01-19 |