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Materials for electrochromic display devices

  • US 4,402,573 A
  • Filed: 06/18/1981
  • Issued: 09/06/1983
  • Est. Priority Date: 06/18/1981
  • Status: Expired due to Fees
First Claim
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1. In an electrochromic display device comprising a transparent front electrode, a back electrode in spaced relation to said front electrode, and an electrochromic solution contained between said electrodes, the improvement according to which the electrochromic solution comprises a para-substituted triphenylamine compound having the formula ##STR4## wherein R is lower alkoxy, lower alkyl or halogen.

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