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United States of America Patent

PATENT NO 11850875
APP PUB NO 20210187988A1
SERIAL NO

17190498

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method includes printing, by one or more printer heads of the printing system, a reactive layer onto print media. The method also includes printing, by the one or more printer heads, a determined number of transmission layers and a determined number of barrier layers in alternation with one another. At least a portion of the reactive layer is configured to migrate through the transmission layers. The method further includes printing, by the one or more printer heads, a reactant layer that is configured to change color responsive to a reaction that occurs between the reactant layer and the reactive layer upon migration of the reactive layer through the determined number of transmission layers. The reaction is configured to occur on a received expiration date.

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Patent Owner(s)

  • XEROX CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bradway, Jeffrey J Rochester, US 31 68
Fromm, Paul M Rochester, US 109 538
Hoover, Linn C Webster, US 138 938
Ruiz, Erwin Rochester, US 116 281
VanKouwenberg, David A Avon, US 47 58

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