Indicator devices and articles comprising the indicator device
US9615619B2 · kind B2 · utility
1Cited by
8References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2011 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Oct 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indicator device comprising a first carrier material; a first pigment disposed in the first carrier material, the first pigment capable of being degraded by exposure to UV radiation; and wherein the first carrier material is configured so as to have a varying thickness such that upon exposure to UV radiation, a visible change in the pigment will occur which will result in a varying visible change over a first surface of the first carrier material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.