Invention Grant
- Patent Title: Composite crystal colloidal array with photochromic member
- Patent Title (中): 具有光致变色构件的复合晶体胶体阵列
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Application No.: US13242038Application Date: 2011-09-23
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Publication No.: US08641933B2Publication Date: 2014-02-04
- Inventor: Sean Purdy , Jessica M. Williamson , Anil Kumar , Noel R. Vanier , Wei Wang , Shan Cheng , Xiangling Xu
- Applicant: Sean Purdy , Jessica M. Williamson , Anil Kumar , Noel R. Vanier , Wei Wang , Shan Cheng , Xiangling Xu
- Applicant Address: US OH Cleveland
- Assignee: PPG Industries Ohio, Inc
- Current Assignee: PPG Industries Ohio, Inc
- Current Assignee Address: US OH Cleveland
- Agent Julie Meder
- Main IPC: G02B5/23
- IPC: G02B5/23 ; G02F1/03 ; G02F1/07
Abstract:
The invention includes a composite material for use in a security device including a radiation diffracting component that exhibits a first optical effect and a photochromic component that exhibits a second optical effect. The composite material is particularly suited for use in authenticating articles, such as currency.
Public/Granted literature
- US20130075676A1 COMPOSITE CRYSTAL COLLOIDAL ARRAY WITH PHOTOCHROMIC MEMBER Public/Granted day:2013-03-28
Information query
