The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 2021
Filed:
Jun. 17, 2016
Fábrica Nacional DE Moneda Y Timbre—real Casa DE LA Moneda, Madrid, ES;
Consejo Superior DE Investigaciones Científicas, Madrid, ES;
José Francisco Fernández Lozano, Madrid, ES;
Rocío Estefanía Rojas Hernández, Madrid, ES;
Esther Enríquez Pérez, Madrid, ES;
Fernando Rubio Marcos, Madrid, ES;
Vicente García Juez, Madrid, ES;
Lara Antón Ibáñez, Madrid, ES;
CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS, Madrid, ES;
FÁBRICA NACIONAL DE MONEDA Y TIMBRE—REAL CASA DE LA MONEDA, Madrid, ES;
Abstract
The present invention relates to a nanostructured phosphorescent pigment comprising an AlOsubstrate; MAlO:X nanocrystals, where M is a cation selected from Ca, Sr, Ba, Mg, Znand combinations thereof and where X is a cation selected from Eu, Dy, Nd, Er, La, Lu, Ce, Y, Gd, Tb, Tm, Yband combinations thereof, disposed on the AlOsubstrate; and nanocrystals of molten salt disposed on the MAlO:X nanocrystals. Additionally, the invention relates to a method for preparing the nanostructured phosphorescent pigment of the invention comprising the steps of i) mixing starting materials comprising a cation M precursor, a cation X precursor, AlOand a molten salt; ii) heating the mixture resulting from step (i) in reducing atmosphere. The invention also relates to the use of the nanostructured phosphorescent pigment of the invention for signaling, illumination, decoration or authentication and to a security article comprising the nanostructured phosphorescent pigment of the invention.