Thermally gated photochromic medium
US7678515B2 · kind B2 · utility
1Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2008 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The presently disclosed embodiments are directed to image forming mediums useful for reimageable and transient documents. More particularly, the embodiments pertain to an image forming medium comprising thermally gated photochromic materials comprising diarylethene (DAE) photochromes which avoid problems with unwanted reduction in color contrast due to background coloration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.