Imaging materials containing novel benzothiazine dyes
US6558888B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2002 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Feb 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to an imaging element comprising a dye represented by Formulae II and IIA below: wherein;R1 represents a hydrogen, an aryl group containing 6 to 14 carbon atoms, or an alkyl group containing 1 to 12 carbon atoms;R2 and R3 together form an aromatic carbocyclic or heterocyclic ring system containing 6 to 14 atoms;X represents a sulfoxide (S═O), sulfone (SO2), carbonyl (C═O) or dicyanovinyl (C(CN)2) group, and Y represents a sulfoxide (S═O), sulfone (SO2), carbonyl (C═O) or dicyanovinyl (C(CN)2) group, with the proviso that X and Y cannot both be carbonyl;L1, L2, and L3 represent methine groups, wherein the methine groups may combine to form a 5- or 6-membered ring when m is equal to or >1;m is 0, 1, 2, or 3;W is an aryl group; andD is a moiety in conjugation with the X and Y groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.