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US 5,919,858 AGranted
Erasable inks
AssigneeThe Gillette Company
InventorRachel M. Loftin
Life of this patent
Estimating the term…
Abstract
An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10 cps and 30 cps.
Claims16
An aqueous-based marking ink, comprising water, a colorant, and a latex emulsion comprising a styrene-butadiene copolymer having a styrene content of less than about 35%, said ink being non-shear thinning and erasable from 60 lb. offset printing paper.
Dependencies are inferred from the claim text.