Electrochromic compounds

  • US 6,037,471 A
  • Filed: 08/26/1998
  • Issued: 03/14/2000
  • Est. Priority Date: 04/02/1997
  • Status: Expired due to Term
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First Claim
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1. A salt of the compound having the formula:

  • ##STR3## where if R1 is phenyl substituted with methoxy or a trimethyl substituted phenyl, R1'"'"' is alkyl having 1 to 9 carbons, and R2, R2'"'"', R6 and R6'"'"' are hydrogen; and

    if R1 and R1'"'"' are m-xylyl and R2, R2'"'"', R6, and R6'"'"' are hydrogen;

    if R1 is phenyl, R1'"'"' is an alkyl substituted aryl having 18 carbons, and R2, R2'"'"', R6, and R6'"'"' are hydrogen;

    if R1 and R1'"'"' are methyl, R2 is aralkyl having 8 or 9 carbons or alkyl having 6 carbons, and R2'"'"', R6, and R6'"'"' are the same or different and are selected from the group selected from hydrogen and alkyl and aralkyl having from 1 to 9 carbons.

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