Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Photochromatic composition endowed with light fatigue resistance and photochromatic articles which contain it

Photochromatic composition endowed with light fatigue resistance and photochromatic articles which contain it

US Patent 5225113 · Granted Jul 6, 1993

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Photochromatic pyrano-1,3-oxazinonaphthalene derivatives2007
Photochromatic compounds, process for their preparation and their use in polymer2002
Light-stabilized organic polymers2002
Photochromatic and thermochromatic compounds and their application in polymeric 1998
Spiro-pyranic compounds endowed with photochromic characteristics1997
Photochromic products and method for their preparation1996
Spiro-pyranic compounds endowed with photochromic characteristics1996
Stabilizing mixture for compounds having a photochromatic activity1993
Stabilizing compositions for organic polymers1993
Photochromatic compound, a method for its preparation, and articles which contai1993
Spiro-indoline oxazine compounds with photochromatic and photosensitizing charac1993
Photochromatic composition and photochromatic articles which contain it1993