Optical recording elements
US5168031A · kind A · utility
8Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Apr 30, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An optical recording element comprising a substrate and as a recording medium a layer comprising a dye having a nucleus of general formula (I): ##STR1## wherein: each Y and Z is independently selected from the group consisting of hydrogen and --XR wherein X is selected from the group consisting of S, Se and Te and R represents an organic radical; with the proviso that one and only one of Y and Z on each phenyl ring must be other than H, and PA0 M is selected from the group consisting of two hydrogen atoms, metals and metal oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.