Oligomeric spiropyrans for erasable medium applications
US8603944B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Oct 21, 2009 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jul 30, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Exemplary embodiments provide compositions and methods for making and using an erasable medium that can contain oligomeric photochromic materials such as spiropyran oligomers, wherein the oligomeric photochromic material can include a plurality of photochromic groups such as spiropyrans covalently connected together by one or more linkers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.