Inkless printing paper and method
US7588878B2 · kind B2 · utility
1Cited by
34References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2007 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Jan 3, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming medium includes a substrate and an imaging layer coated on or impregnated into the substrate, where the imaging layer includes a photoacid generator and an acid-base indicator. In the image forming medium, irradiation of the imaging layer causes the photoacid generator to generate an acid that reacts with the acid-base indicator to produce an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.