Photochromic material, inkless reimageable printing paper, and methods
US7718325B2 · kind B2 · utility
22Cited by
35References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Jun 29, 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 said substrate, where the imaging layer includes as a photochromic material a spiropyran compound having a conjugated pathway, dispersed in a polymeric binder, wherein the photochromic material exhibits a reversible transition between a colorless state and a colored state in response to heat and light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.