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US 4,286,989 AGranted
Formulations for ink jet printing
AssigneeInternational Business Machines Corporation
InventorsLeo J. Kadehjian, Harbans S. Sachdev, Clinton D. Snyder
Life of this patent
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Abstract
An ink for use in ink jet printing has as its coloring material a dye having the formula: ##STR1## where R is --OCH.sub.2 CO.sub.2.sup.-, --CH.sub.2 CO.sub.2.sup.-, --PO.sub.3.sup.= or --CH.sub.2 --PO.sub.3.sup.=.
Claims7
An ink for use in ink jet printing comprising an aqueous solution of a coloring material having the formula ##STR4## where R is --OCH.sub.2 CO.sub.2.sup.-,--CH.sub.2 CO.sub.2.sup.-,--PO.sub.3.sup.= or --CH.sub.2 --PO.sub.3.sup.=.
Dependencies are inferred from the claim text.