Photochromic compounds having at least two photochromic moieties
US8647538B2 · kind B2 · utility
4Cited by
69References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Dec 16, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to photochromic compounds that include at least two photochromic moieties that are linked together by a multivalent linking group. The multivalent linking group can be selected so as to be flexible and/or substantially prevent electronic interaction between any two photochromic moieties through the multivalent linking group. The present invention also relates to photochromic compositions and articles that include at least a photochromic amount of one or more photochromic compounds of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.