Fluoran derivatives as new compounds, process for preparing the same and recording system utilizing the same as colorless chromogenic material
US4524373A · kind A · utility
4Cited by
5References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 17, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Feb 17, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/1455
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A new fluoran derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1, R.sub.2, X, Y and Z have the same meaning as defined hereinbefore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.