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. 08, 2017
Filed:
Oct. 22, 2013
Sicpa Holding SA, Prilly, CH;
Olivier Lefebvre, Montagny-pres-Yverdon, CH;
Patrick Magnin, Maxilly-sur-Leman, FR;
Christophe Schaller, Ollon, CH;
SICPA HOLDING SA, Prilly, CH;
Abstract
The present invention relates to the field of the protection of security documents, especially banknotes, against illegal actions such as robbery or theft. In particular, the present invention relates to the field of ink compositions for producing irreversibly magnetically induced images or patterns, said inks comprising multichromal microspheres, preferably bichromal microspheres () that are orientable upon application of a magnetic field and that comprise at least a first portion () comprising one or more dyes and/or pigments and at least a second portion () comprising one or more magnetic or magnetizable materials, wherein said microspheres () comprise as the first portion a core () having a surface and comprising the one or more dyes and/or pigments and as the second portion a partial coating () covering at least a portion of the surface of said core () and comprising the one or more magnetic or magnetizable materials.