Photochromic indeno fused phenanthrenopyran compounds
US11453654B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | May 10, 2017 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Oct 20, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to photochromic indeno fused phenanthrenopyran compounds represented by the following Formula (I). With some embodiments, the photochromic compounds represented by Formula (I) include at least one lengthening group (e.g., R6 and/or R7 each independently being a lengthening group) and the compounds of the present invention are photochromicdichroic compounds. The present invention also relates to photochromic compositions and photochromic articles, such as photochromic ophthalmic articles that include one or more photochromic compounds represented by Formula (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.