Phenothiazine leucodyes for electrochromic recording

Details Phenothiazine leucodyes for electrochromic recording Phenothiazine leucodyes for electrochromic recording

1982-09-29

1984-03-27

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 15, B21H 120, B41C 308

Patent

active

044392800

ABSTRACT:
An electrochromic recording substrate comprising bromide ions and a leucodye having the structure ##STR1## wherein R is lower alkyl, lower alkoxy, lower thioalkyl, lower dialkylamino, or diarylamino.

REFERENCES:
patent: 4211616 (1980-07-01), Sambucetti
patent: 4309255 (1982-01-01), Gendler et al.
patent: 4374001 (1983-02-01), Bernier

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