Pigment-based ink formulations having improved printhead lifetime

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United States of America Patent

PATENT NO 11441044
SERIAL NO

16549570

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Abstract

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An aqueous-based inkjet ink for a thermal inkjet printhead includes: a pigment; 2 to 90 ppm ammonium ions; and an ink vehicle. The ink has a pH in the range of 8 to 9.5 and exhibits improved lifetime in thermal inkjet printheads with minimal loss of print quality.

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Patent Owner(s)

Patent OwnerAddress
MEMJET TECHNOLOGY LIMITEDDUBLIN 2 D02 PX60

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chong, Alison North Ryde, AU 1 0
Davey, Roger North Ryde, AU 2 1
Fielder, Simon North Ryde, AU 53 282
Hudson, Tim North Ryde, AU 14 69
Munton, Ellaine North Ryde, AU 4 0
Tyvoll, David North Ryde, AU 56 1501

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