EP 3341878 A4 20190904 - GAS CHROMIC FIBERS AND INCLUSIONS FOR SECURITY ARTICLES
Title (en)
GAS CHROMIC FIBERS AND INCLUSIONS FOR SECURITY ARTICLES
Title (de)
GASCHROMFASERN UND EINSCHLÜSSE FÜR SICHERHEITSARTIKEL
Title (fr)
FIBRES GAZOCHROMIQUES ET INCLUSIONS POUR ARTICLES DE SÉCURITÉ
Publication
Application
Priority
US 2015046514 W 20150824
Abstract (en)
[origin: WO2017034540A1] Disclosed are security articles and methods and systems for authenticating security articles using a plurality of stimuli. According to one embodiment, an illustrative secured article includes an embedded feature wherein differential activation of phosphorescent or fluorescent materials creates a machine readable response through the simultaneous presence of a source of electromagnetic radiation and a specific gas environment. A detector detects a differential spectral emission across the security feature that results from the change in gas environment. The spectral emission may be compared to an expected emissive signature to determine authenticity of the security article.
IPC 8 full level
B42D 25/29 (2014.01); B42D 25/36 (2014.01); B42D 25/382 (2014.01); B42D 25/387 (2014.01); G01N 15/08 (2006.01); G07D 7/12 (2016.01); G07D 7/185 (2016.01)
CPC (source: EP)
B42D 25/29 (2014.10); B42D 25/36 (2014.10); B42D 25/378 (2014.10); B42D 25/382 (2014.10); B42D 25/387 (2014.10); G01N 15/082 (2013.01); G06F 21/00 (2013.01); G06V 20/80 (2022.01); G07D 7/1205 (2017.04); G07D 7/205 (2013.01)
Citation (search report)
- [XY] US 2014159860 A1 20140612 - LAWANDY NABIL [US]
- [XY] US 9075020 B2 20150707 - LAWANDY NABIL M [US]
- [Y] US 2013234043 A1 20130912 - HUSSAIN KHALID [US], et al
- [XY] WO 2015066716 A2 20150507 - SPECTRA SYSTEMS CORP [US]
- See references of WO 2017034540A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2017034540 A1 20170302; BR 112018003359 A2 20180925; CN 108140103 A 20180608; EP 3341878 A1 20180704; EP 3341878 A4 20190904
DOCDB simple family (application)
US 2015046514 W 20150824; BR 112018003359 A 20150824; CN 201580083239 A 20150824; EP 15902410 A 20150824