Photochromic medium with erase-on-demand capability
US7964271B2 · kind B2 · utility
20Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2008 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Jul 21, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31993
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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 photochromic materials comprising unsymmetrical dithienylethene (DTE) photochromes which provide longer image lifetimes and “erase-on-demand” capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.