Changing light absorption by disruption of conjugation
US7368221B2 · kind B2 · utility
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13References
3Claims
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Key dates
| Filing date | Sep 23, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Copy-protected optical medium utilizing a composition comprising a transient optical state change security materials constrained to change the optical state light absorption at a wavelength of about 400 nm and an electron transfer agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.