Electrochromic medium having a color stability

  • US 6,407,847 B1
  • Filed: 07/25/2000
  • Issued: 06/18/2002
  • Est. Priority Date: 07/25/2000
  • Status: Expired due to Term
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First Claim
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1. A window comprising an electrochromic medium having a color stability Δ

  • E less than 5, measured in its minimum low transmission state after exposure to 700 hours in a weatherometer while cycling, each cycle consisting of application of sufficient potential for a sufficient time such that the window reaches its low transmission state for at least 210 hours.

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