Yellow images with improved light stability and yellow dyes...

Record receiver having plural interactive leaves or a colorless – Having plural interactive leaves

Reexamination Certificate

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C106S031430, C106S031450

Reexamination Certificate

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06869909

ABSTRACT:
Disclosed is a dye combination and a thermal dye transfer yellow donor element containing the combination of dyes useful for forming a light stable yellow image comprising a yellow dye having the formula:wherein:R1and R2each independently represents an alkyl group of from 1 to 10 carbons atoms or a cycloalkyl group of from 5 to 7 carbon atoms;R3and R4each independently represents hydrogen, or an unsubstituted lower alkyl group of 1 to 4 carbon atoms;each Y independently represents halogen, or a lower alkyl or alkoxy group of 1 to 4 carbon atoms; andm is 0 to 4.Such a dye combination and element provide improved color and stability, especially for proofing.

REFERENCES:
patent: 4701439 (1987-10-01), Weaver et al.
patent: 4833123 (1989-05-01), Hashimoto et al.
patent: 5081101 (1992-01-01), Evans et al.
L. A. Kaszczuk, et al, “Thermal Yellow Donor and Dyes”, USSN 10/ , (D-83869) filed May 22, 2002.

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