Optical article having anti-theft feature and a system and method for inhibiting theft of same
US8057886B2 · kind B2 · utility
Assignee
Inventors
- Marc Brian Wisnudel
- Terry Michael Topka
- Pingfan Wu
- Radislav Alexandrovich Potyrailo
- David Gilles Gascoyne
- William David Smith, II
- Adil Minoo Dhalla
- Yogendrasinh Bharatsinh Chauhan
- Rupesh Pawar
- Bharat Singh
- Sriramakrishna Maruvada
- Vandita Pai-Paranjape
- Kenneth Brakeley Welles, II
- Philippe Schottland
- Eugene Olczak
- Ashok Menon
Key dates
| Filing date | Feb 12, 2010 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Feb 12, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24917
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for altering a functionality of an optical article from a pre-activated state to an activated state, comprising an optical article comprising an optical data layer for storing data, an external radiation source for generating an external stimulus adapted to interact with the optical article, such interaction causing a change in optical accessibility of optically stored data, a directing material, wherein said directing material is for directing the external stimulus to selective portions of the optical article, thereby altering the functionality of the optical article from a pre-activated state to an activated state; a convertible element capable of responding to the external stimulus to irreversibly alter the optical article from the pre-activated state of functionality to the activated state of functionality, wherein said convertible element comprises a color-shift dye, a magnetic material, a thermo-chromic material, a magneto-optical material, a light scattering material, a phase-change material, dye aggregates, or combinations thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.