Invention Grant
- Patent Title: Photoluminescent iron-doped barium stannate material, security ink composition and security feature thereof
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Application No.: US16496309Application Date: 2018-03-20
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Publication No.: US11352517B2Publication Date: 2022-06-07
- Inventor: Scott Haubrich , Pascal Pinceloup , Eden Michele Anthanasee Green , David Anderson , Matthew Sturgeon
- Applicant: SICPA HOLDING SA
- Applicant Address: CH Prilly
- Assignee: SICPA HOLDING SA
- Current Assignee: SICPA HOLDING SA
- Current Assignee Address: CH Prilly
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: EP17169120 20170502
- International Application: PCT/EP2018/056948 WO 20180320
- International Announcement: WO2018/172318 WO 20180927
- Main IPC: C09D11/50
- IPC: C09D11/50 ; B42D25/21 ; B42D25/382 ; B42D25/387 ; C09D11/037 ; C09D11/322 ; C09K11/66 ; G07D7/1205 ; C09D11/00 ; B41M3/14 ; G01N21/64
Abstract:
The present invention provides photoluminescent iron-doped barium stannate materials absorbing ultraviolet (UV) light and exhibiting strong near-infrared (NIR) luminescence. Such materials exhibit increased integrated photoluminescence intensity in comparison to known BaSnO3 and iron-doped barium stannate materials, and therefore they are particularly useful for the production of photoluminescent security ink compositions and transparent covert security features with improved anti-counterfeiting resistance that can be used for protection of documents and articles against counterfeit and illegal reproduction.
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