Color-stabilized electrochromic devices
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United States of America Patent
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Nov 26, 2002
Grant Date -
Aug 29, 2002
app pub date -
Oct 25, 2001
filing date -
Aug 19, 1999
priority date (Note) -
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Abstract
An electrochromic medium for use in a normally operating electrochromic device comprising an anodic material and a cathodic material wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic, an additive, and means associated with the additive for maintaining a colorless or nearly colorless electrochromic medium while the electrochromic medium is in a high transmission state relative to an electrochromic medium without the additive.
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