Electrochromic devices with bipyridinium salt solutions

  • US 5,336,448 A
  • Filed: 06/25/1991
  • Issued: 08/09/1994
  • Est. Priority Date: 06/25/1991
  • Status: Expired due to Fees
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First Claim
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1. A solution-phase electrochromic device in which the solution of variable transmittance comprises a solvent, which is a liquid at room temperature, and a salt of a cation of Formula XVII ##STR10## wherein R36 and R37 are independently selected from the group consisting of benzyl and alkyl of 1-20 carbon atoms;

  • and R34, R35, R38 and R39 are independently selected from the group consisting of alkyl groups of 1-4 carbon atoms.

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