Recording and information record elements comprising oxoindolizine and oxoindolizinium dyes
US4446223A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Jun 24, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Oxoindolizine and oxoindolizinium dyes are useful as radiation absorptive materials in recording elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.