Ink cartridge comprising weakly acidic naphthalocyanine ink...

Coating implements with material supply – Including rupturable means or sealed-cartridge receiver

Reexamination Certificate

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C106S031130, C540S145000

Reexamination Certificate

active

08079769

ABSTRACT:
An ink cartridge for an inkjet printer contains an aqueous ink formulation. The ink formulation comprising an IR-absorbing naphthalocyanine dye of formula (II):or a salt form thereof, wherein:M is Ga(A1);A1is an axial ligand selected from —OH, halogen, —OR3, —OC(O)R4or —O(CH2CH2O)eRewherein e is an integer from 2 to 10 and Reis H, C1-8alkyl or C(O)C1-8alkyl;R1and R2may be the same or different and are selected from hydrogen or C1-12alkoxy;R3is selected from C1-12alkyl, C5-12aryl, C5-12arylalkyl or Si(Rx)(Ry)(Rz);R4is selected from C1-12alkyl, C5-12aryl or C5-12arylalkyl; andRx, Ryand Rzmay be the same or different and are selected from C1-12alkyl, C5-12aryl, C5-12arylalkyl, C1-12alkoxy, C5-12aryloxy or C5-12arylalkoxy.The ink formulation has a characteristic pH in the range of 4 to 6.5.

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Dymetman, M., and Copperman, M., “Intelligent Paper in Electronic Publishing, Artist Imaging, and Digital Typography, Proceedings of EP '98”, Mar./Apr. 1998, Springer Verlag LNCS 1375, pp. 392-406.

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