Methods and systems for identifying ink
US8669536B2 · kind B2 · utility
4Cited by
28References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2013 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Feb 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6439
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ink composition includes a colorant visible under visible light and a tagging composition, including a carrier and a detectable marker dispersed or dissolved in the carrier. The detectable marker is an isotope of an element, the isotope being present in the ink composition in a concentration ranging from about 1 parts per billion (ppb) to about 1000 ppb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.