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:
Aug. 06, 2024
Filed:
Nov. 09, 2021
Sicpa Holding SA, Prilly, CH;
Hervé Pittet, Châtel-st-Denis, CH;
Marlyse Demartin Maeder, La Sarraz, CH;
Patrick Veya, Aclens, CH;
Nikolay Grigorenko, Möhlin, CH;
Andre Oswald, Rheinfelden, DE;
SICPA HOLDING SA, Prilly, CH;
Abstract
The present invention provides a UV-Vis radiation curable security ink for producing a security feature for securing value documents, wherein said security feature exhibits a blue color upon viewing in transmitted light and a metallic yellow color upon viewing in incident light. The UV-Vis radiation curable security ink comprises a cationically curable or a hybrid curable ink vehicle, and silver nanoplatelets bearing a surface stabilizing agent of general formula (I) wherein the residue Ris a C-Calkyl group substituted with a hydroxy group; the residue Ris selected from a C-Calkyl group, and a C-Calkyl group substituted with a hydroxy group; and Catis a cation selected from the group consisting of Na, K, Csand Rb.