Photochromic plastic object
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United States of America Patent
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Feb 26, 2008
Grant Date -
Jul 15, 2004
app pub date -
Jul 29, 2003
filing date -
Jan 29, 2001
priority date (Note) -
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Abstract
A photochromic plastic object made of a transparent synthetic resin material composed of at least two mutually penetrating polymer networks of different polymer materials and containing at least one photochromic dye homogeneously distributed therein, and a method for producing such a photochromic object.
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