Class of non-sensitizing infra-red dyes for use in photosensitive elements
US5741632A · kind A · utility
6Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Dec 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/145
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel class of non-sensitizing infra-red dyes derived from heptamethine dyes with indolenine nuclei is disclosed. They are useful as filter-, acutance- or antihalation dyes for photographic elements based on silver halide or for photothermographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.