US 11,809,933 B2
Method of detecting a concealed pattern
Nicolas B. Duarte, Allison Park, PA (US); Zachary J. Brown, Austin, TX (US); Juan F. Choreno, Zumpango (MX); Julian M. Galvan-Miyoshi, Texcoco (MX); Darin W. Laird, Allison Park, PA (US); Alejandro Morones Dobarganes, Tepexpan (MX); and Jose Alberto Olivares Lecona, Mexico City (MX)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed on Aug. 2, 2022, as Appl. No. 17/879,279.
Application 17/879,279 is a continuation of application No. 17/293,813, granted, now 11,461,607, previously published as PCT/US2019/060897, filed on Nov. 12, 2019.
Claims priority of provisional application 62/760,371, filed on Nov. 13, 2018.
Prior Publication US 2022/0374667 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06K 19/06 (2006.01); B05D 5/06 (2006.01); B05D 7/00 (2006.01); G06K 7/12 (2006.01)
CPC G06K 19/0614 (2013.01) [B05D 5/06 (2013.01); B05D 7/52 (2013.01); G06K 7/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A component including a concealed pattern, comprising:
a substrate;
a pattern disposed over at least a portion of the substrate;
an optional primer layer disposed between at least a portion of the substrate and at least a portion of the pattern; and
a visibly opaque layer comprising an infrared transparent pigment, the visibly opaque layer disposed over at least a portion of the pattern,
wherein the reflectivity and/or absorbance of infrared electromagnetic radiation by the pattern at one wavelength differs from the reflectivity and/or absorbance by the primer layer and/or the substrate at the same wavelength,
wherein the infrared transparent pigment comprises a pigment selected from the group consisting of copper phthalocyanine pigment, halogenated copper phthalocyanine pigment, anthraquinone pigment, quinacridone pigment, perylene pigment, monoazo pigment, disazo pigment, quinophthalone pigment, indanthrone pigment, dioxazine pigment, isoindoline pigment, diarylide yellow pigment, brominated anthranthrone pigment, azo metal complex pigment, and combinations thereof and/or a titanium dioxide pigment having an average particle size of from 0.1-1.0 μm; and
wherein the visibly opaque layer is substantially free of an infrared absorbing pigment and/or an infrared reflective pigment.