Electrochromic recording paper
US4309255A · kind A · utility
52Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1980 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Sep 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A medium for electrochromic recording is provided by treating paper with a water soluble leuco methylene blue compound having the formula ##STR1## wherein R is a sulfonated aromatic or sulfonated aliphatic moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.