Photochromic polymer
US9217812B2 · kind B2 · utility
3Cited by
1References
18Claims
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Key dates
| Filing date | May 2, 2012 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Jun 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A photochromic polymer comprising at least two photochromic moieties linked by a straight or branched chain polymer selected from the group consisting of poly(C2 to C4 alkylene oxide), poly[C1 to C10 alkoxy substituted (C2 to C4 alkylene oxide)] and poly[C1 to C-15 acyloxy substituted (C2 to C4 alkylene oxide)].
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.