Toner for producing secure images and methods of forming and using the same
US6991883B2 · kind B2 · utility
5Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2003 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Dec 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24884
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for printing documents that are difficult to forge and that are readily easy to visually verify and methods of using and forming the toner are disclosed. The toner includes a colorant for printing an image on a surface of a document and a dye for forming a latent version of the image underneath a surface of a substrate. An image formed using the toner of the invention is readily verified by comparing the colorant-formed image and the dye-formed image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.