Safety element and a valuable object
US7316422B1 · kind B1 · utility
13Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/916
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an object of value with a security element having a thermochromic layer and disposed completely on the surface of the object of value. The thermochromic layer is combined with an effect layer having visually and/or machine testable properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.