Phenothiazine leucodyes for electrochromic recording
US4439280A · kind A · utility
12Cited by
3References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 29, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Sep 29, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.